Cross reference
Acts 13:33
33 Which God has now put into effect for our children, by sending Jesus; as it says in the second Psalm, You are my Son; this day I have given you being.
Psalms 2:7
7 I will make clear the Lord's decision: he has said to me, You are my son, this day have I given you being.
Hebrews 5:5
5 In the same way Christ did not take for himself the glory of being made a high priest, but was given it by him who said, You are my Son, this day I have given you being:
Hebrews 1:5-6
5 To which of the angels did God say at any time, You are my Son, this day I have given you being? or, I will be his Father, and he will be my Son?
6 And again, when he is sending his only Son into the world, he says, Let all the angels of God give him worship.