Hebrews 7:21

but his appointment was ratified by an oath, when God said to him-- 'The Lord has sworn, and will not change, "Thou art a priest for all time."'

Treasury of Scripture Knowledge

Summary

Lord, where are thy former lovingkindnesses, which thou swarest unto David in thy truth?

Bible References

Thou

Hebrews 7:21
but his appointment was ratified by an oath, when God said to him-- 'The Lord has sworn, and will not change, "Thou art a priest for all time."'