The Gospel reading for the Divine Liturgy on the Sunday before Christmas is "the Genealogy of Jesus Christ, the son of David, the son of Abraham", taken from the Gospel according to St. Matthew. This genealogy lists the generations of people from Abraham to David, to the Babylonian captivity of the people of Israel, to the birth of Jesus. It is a selected genealogy, ending in the appearance of "Joseph, the husband of Mary, of whom Jesus was born, who is called Christ" (Matthew, 1:16). It differs from the genealogy presented in St. Luke's Gospel, which begins with Jesus "being the son (as was supposed) of Joseph", and goes back all the way not simply to Abraham but to Adam (Luke, 3:23-38).
for He cannot deny Himself. (2 Timothy, 2:11-13)