NET

12 But when this priest had offered one sacrifice for sins for all time, he sat down at the right hand of God,

Darby

12 But *he*, having offered one sacrifice for sins, sat down^D9101 in perpetuity^D9102 at [the] right hand of God,

Darby Bible Notes

down - Or 'set himself down,' as ch. 1.3. perpetuity - See Note, ch. 5.6. Having perfectly completed the work, he could sit down, and abide so, having done all; it is in contrast with the priests. They stood daily; he is set down 'for a continuance.' Connecting 'in perpetuity' with sacrifice spoils the whole force of the passage.

KJV

12 But this man, after he had offered one sacrifice for sins for ever, sat down on the right hand of God;