Albert Barnes Commentary Hebrews 10:12

"but he, when he had offered one sacrifice for sins for ever, sat down on the right hand of God;" — Hebrews 10:12 (ASV)

But this Man. The Lord Jesus. The word man is not in the original here. The Greek is literally "but this"; that is, this priest. The apostle does not state here whether he was a man or a being of a higher order; he merely mentions him as a priest, in contrast to the Jewish priests.

After he had offered one sacrifice for sins. By dying on the cross. This he did only once; this could not be repeated; and it need not be repeated, for it was sufficient for the sins of the world.

For ever sat down. That is, he sat down then, to return no more for the purpose of offering sacrifice for sin. He will no longer submit himself to scenes of suffering and death to expiate human guilt.

On the right hand of God. See Barnes on Mark 16:19.

Compare. See Barnes on Ephesians 1:20 and following.