Matthew 3:16

And Jesus when he was baptized, went up straightway out of the water--rather, "from the water." Mark has "out of the water" (Mar 1:10). "and"--adds Luke (Luk 3:21), "while He was praying"; a grand piece of information. Can there be a doubt about the burden of that prayer; a prayer sent up, probably, while yet in the water--His blessed head suffused with the baptismal element; a prayer continued likely as He stepped out of the stream, and again stood upon the dry ground; the work before Him, the needed and expected Spirit to rest upon Him for it, and the glory He would then put upon the Father that sent Him--would not these fill His breast, and find silent vent in such form as this?--"Lo, I come; I delight to do Thy will, O God. Father, glorify Thy name. Show Me a token for good. Let the Spirit of the Lord God come upon Me, and I will preach the Gospel to the poor, and heal the broken-hearted, and send forth judgment unto victory." While He was yet speaking-- lo, the heavens were opened--Mark says, sublimely, "He saw the heavens cleaving" (Mar 1:10). and he saw the Spirit of God descending--that is, He only, with the exception of His honored servant, as he tells us himself (Joh 1:32-34); the by-standers apparently seeing nothing.

— Jamieson-Fausset-Brown Commentary (public domain)