Hebrews 7:17

For he testifieth, Thou art a priest for ever after the order of Melchisedec.
— Hebrews 7:17, King James Version

In other translations

World English Bible (WEB)

for it is testified, "You are a priest forever, According to the order of Melchizedek."

American Standard Version (ASV)

for it is witnessed of him, Thou art a priest for ever After the order of Melchizedek.

Young's Literal Translation (YLT)

for He doth testify--'Thou <FI>art<Fi> a priest--to the age, according to the order of Melchisedek;'