John 3:35

The Father loveth the Son, and hath given all things into his hand.

Again, the baptismal scene was in the mind of the herald. "This is my beloved Son!" He was trying to counteract the jealousy of the disciples who would not follow Jesus by repeating the deduction which he had made following the baptism of Jesus, namely, that God had given all things into Jesus' hands, a deduction he could not have avoided, for "beloved Son" would have required it. These words fit the historical situation exactly, leaving no need for any supposition that the apostle was merely injecting his own words into the narrative at this point.