King James Version (KJV)

Hebrews 10:12

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

Verse in context — Hebrews 10

By the which will we are sanctified through the offering of the body of Jesus Christ once [for all].

And every priest standeth daily ministering and offering oftentimes the same sacrifices, which can never take away sins:

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

From henceforth expecting till his enemies be made his footstool.

For by one offering he hath perfected for ever them that are sanctified.

Jesus as the ultimate High Priest and fulfillment of the Old Covenant.