“And we declare unto you glad tidings, how that the promise which was made unto the fathers,”
King James Version (KJV)
13:31 He was seen many days by them who came up with him from Galilee to Jerusalem - This last journey both presupposes all the rest, and was the most important of all.
13:33 Thou art my Son, this day have I begotten thee - It is true, he was the Son of God from eternity. The meaning therefore is, I have this day declared thee to be my Son. As St. Paul elsewhere, declared to be the Son of God with power, by the resurrection from the dead, #Rom 1:4|. And it is with peculiar propriety and beauty that God is said to have begotten him, on the day when he raised him from the dead, as he seemed then to be born out of the earth anew. #Psalm 2:7|.
13:34 No more to return to corruption - That is, to die no more. I will give you the sure mercies of David - The blessings promised to David in Christ. These are sure, certain, firm, solid, to every true believer in him. And hence the resurrection of Christ necessarily follows; for without this, those blessings could not be given. #Isaiah 55:3|.