Here are the
Summa references for the EF Sunday Within Octave of Christmas, Circumcision, Epiphany, and Sunday within Octave of Epiphany.
Sunday Within Octave of Christmas
EPISTLE (Gal. 4:1-7)
"Serving under the elements of the world"
Was the Old Law a law of fear? I-II Q.107, a.1, ad.2; Q.91, a.5
"When the fullness of time was come"
Was Christ born at a suitable time? III Q.35, a.8
"God sent His Son"
The mission of the divine Person I Q.43
"Made of a woman"
Did Christ take His flesh from Mary? III Q.31, a.2; a.4
"From (of) a woman"
Was Mary a virgin in conceiving Christ? III Q. 28, a.1
The term "woman" explained III Q. 28, a.1, ad.3
"Made under the law"
Why Christ wished to assume the burden of the law III Q.37
Christ and the law III Q.40, a.4
"That we might receive the adoption of sons"
The adoption of the sons of God III Q.23
How God, out of His goodness, admits man to happiness III Q.13, a.1
Difference between:--
Adopted Son of God
Natural Son of God III Q.23, a.2
How one becomes through grace an adopted son of God III Q.23, a.3
On adoption--See Epistle, 8th Sunday after Pentecost
GOSPEL (Luke 2:33-40)
"This Child is set for the fall and for the resurrection of many"
Scandal II-II Q.43
Passive and active II-II Q.43, a.1, ad.4
"And thy own soul a sword shall pierce"
What is this sword which pierces Mary's soul? III Q.27, a.4, ad.2
"And there was one Anna a prophetess"
How the birth of Christ was revealed to Simeon and Anna III Q.36, a.3
The meaning of Simeon, who expected the redemption of Israel, finally knowing Christ, and the Magi who had not expected it so anxiously, knowing it before III Q.36, a.6, ad.1
"Departed from the temple"
Does prayer require a given place? II-II Q.84, a.3
Why we worship towards the east rather than the west II-II Q. 84, a.3, ad.3
"By Fasting"
Fasting II-II Q. 147
"And prayers"
Prayer II-II Q. 83
"Returned to their city Nazareth"
Why Nazareth is called the City of Christ; why He was born in Bethlehem and not Nazareth III, Q.35, a.7, ad.2
"Full of wisdom"
Was there ignorance in Christ? III Q.15, a.3
Circumcision
EPISTLE (Titus 2:11-15)
"The grace of God our Savior hat appeared to all men"
The manifestation of the born Christ III Q.36
How the grace of our Savior reached those to whom His birth was not made known III Q.36, a.1, ad.2
"Denying ungodliness"
Infidelity II-II Q.10
"We should live soberly"
Temperance II-II Q.141
"And justly"
Justice II-II Q.58
"And godly in this world
Religion II-II Q.81
"Who gave Himself for us"
How Christ was the cause of His own passion and death III Q.47, a.1
"That He might redeem us from all iniquity"
Were we freed from sin by Christ's passion? III Q.49, a.1
Were we freed from punishment of sin by Christ's passion III Q.49, a.3
"And might cleanse to Himself a people acceptable"
Whether by Christ's passion we were reconciled to God III Q.40, a.4
GOSPEL (Luke 2:21)
"After eight days were accomplished"
Why the circumcision was delayed to the eighth day III Q.70, a.3, ad.3.
"That the Child should be circumcised"
Whether circumcision was conveniently instituted III Q.70, a.3
Did it confer sanctifying grace? III Q.70, a.3
The efficacy of the sacraments III Q.62
"The child"
Why should Christ wish to be circumcised, when He had not contracted original sin? III Q.37, a.1
Since Christ by His circumcision merited eternal salvation for us, why should He wish to die on the cross III Q.48, a.1, ad.2; Q.47, a.1; Q.37, a.1, ad.3
Is circumcision now permissible? I-II Q.103, a.4
"His name was called Jesus"
Was that name conveniently given to Christ? III Q.37, a.2
The names of God I Q.13
Whether salvation other than by Christ is possible II-II Q.2, a.7; III, Q.68, a.1; III Q.46, a.1; a.2; a.3.
Epiphany
EPISTLE (Isaiah 60:1-6)
"Arise, be enlightened"
Whether, without grace, man can know truth I-II Q.109, a.1
Did man, in state of innocence, have all knowledge? I Q.94, a.3
Did children born in state of innocence have perfect knowledge and use of reason? I Q.101, a.1; a.2
Did ignorance stem from sin? I-II Q.85, a.3
"For Thy light is come"
How Christ is Head of the Church III Q.8, a.6
How Christ's grace is in members of the Church III Q.8, a.6
How is Christ the light and salvation of people to whom He never preached? III Q.42, a.1, ad.1
"The strength of the Gentiles will come to thee"
Whether Christ's mission was to save the Gentiles III Q.36, a.3, ad.3; Q.42, a.1; Q.46, a.4
The conversion of the Gentiles III Q.55, a.6, ad.3; II-II Q.176, a.1, ad.3
GOSPEL (Matthew 2:1-12)
"When Jesus was born in Bethlehem"
Why Christ wished Bethlehem as His birthplace III Q.7; Q.46, a.10
"Behold there came wise men"
What kind of people were the wise men? III Q.36, a.3, ad.2
"From the east"
Where did they come from? III Q.36, a.3, ad.3; ad.4; ad.6
"To Jerusalem"
Why the star did not lead the wise men to Bethlehem, Christ's birthplace III Q.36, a.8, ad.3
"Saying where is He that is born"
Why the wise men did not fear announcing the birth of Christ, with other rulers of the Jews alive III Q.36, a.8, ad.2
Why a new star appeared at Christ's birth III Q.44, a.2, ad.3
"We have seen His star"
Which star appeared to the Magi? III Q.36, a.7
Was it created at the beginning as one of the stars? III Q.36, a.7
Was this star a comet? III Q.36, a.7, ad.3
When did the star appear to the Magi? III Q.36, a.6, ad.3
"His" (Star)
Was this star a sure sign of the nativity of Christ? III Q.36, a.5, ad.3
"In the east"
Did the star appear more to those in the east than in Judea? III Q.36, a.7
Since not only in the east but also in the west people are saved through Christ, why did this star appear in the east only? III Q.36, a.3, ad.3
"And are come to adore Him"
Whether it was proper for the wise men to come and adore Christ III Q.36, a.8
When after Christ's birth did they come? III Q.36, a.6, ad.3
Why Herod and Jerusalem were disturbed III Q.36, a.2, ad.3
"And the star went before them until it came," etc.
Why did the star manifest a residence different from that where Christ was born: III Q.36, a.1
"They adored Him"
The adoration of Christ III Q.25
"They offered Him gifts, gold," etc.
Did they confess by these gift any royal dignity or rather that Christ was truly God? III Q.36, a.8, ad.3
Sunday within Octave of Epiphany
EPISTLE (Romans 12:1-5)
"That you present your bodies a living sacrifice, holy"
Whether corporeal works, continence, martyrdom are a sacrifice II-II Q.85, a.3, ad.2
On parts of temperance II-II Q.143
"That you may prove what is the good will of God"
Is it lawful to doubt if God's will is good II-II Q.127, a.2, ad.2
"Not to be more wise than it behooveth"
Sobriety and contemplation of wisdom II-II Q.148, a.1, c.
On humility and bride II-II Q.161; Q.162
"And according as God hath divided to every one the measure of faith"
Is faith infused in man by God? II-II Q.6, a.1
Is faith found more in one than another? II-II Q.5, a.4
"For as in one body we have many members"
Since the intellectual soul is one form, why is it composed of different parts? I Q.76, a.5, ad.3
"So we, being many, are one body in Christ"
Should there be different offices and states in the church? II-II Q.183, a.2
GOSPEL (Luke 2:42-52)
"according to the custom of the feast"
Various solemnities of the Old Law, their institution, significance I-II Q.102, a.4, ad.10
Which feasts of the New Testament followed those of the Old Testament? I-II Q.103, a.4, ad.4
The observance of the Sabbath and Sunday II-II Q.122, a.4
"And His parents knew it not"
How is Joseph called the father of Christ? III Q.28, a.1, ad.1
"And asking them questions"
Why did Jesus ask the doctors questions, since he could learn nothing from them III Q. 12, a.3, ad.1
"Astonished at His wisdom and His answers"
On the science (knowledge) of Christ III Q.11, Q.12
"And was subject to them"
Respect to parents II-II Q.101
Obedience II-II Q.104
"And His mother kept all these words in her heart"
How Mary had use of wisdom in contemplation III Q.27, a.5, ad.3
"Advanced in wisdom"
How could Christ advance in wisdom or learn anything? III Q.12
"And grace"
How could He advance in grace and have fullness of it? III Q.7, a.12
Cf.
The Summa of St. Thomas Aquinas, Vol III, New York: Benziger, 1947, 3726-3728.