This day have I begotten Thee...
Psalm 2:7 is referred to three times in the New Testament, and every single time, read in context, it is used only in reference to His Resurrection...
Acts 13:33
God hath fulfilled the same unto us their children, in that He hath raised up Jesus again; as it is also written in the second psalm, Thou art my Son, this day have I begotten Thee.
Hebrews 1:4-6
(4) Being made so much better than the angels, as he hath by inheritance obtained a more excellent name than they.
(5) For unto which of the angels said he at any time, Thou art my Son, this day have I begotten thee? And again, I will be to him a Father, and he shall be to me a Son?
(6) And again, when he bringeth in the firstbegotten into the world, he saith, And let all the angels of God worship him.
Hebrews 5:5
So also Christ glorified not Himself to be made an High Priest; but He that said unto Him, Thou art My Son, to day have I begotten Thee.