Parallel
Hebrews 7:20
Patriarchal Greek New Testament (1904) · Berean Standard Bible
καὶ καθ᾽ ὅσον οὐ χωρὶς ὁρκωμοσίας· — οἱ μὲν γὰρ χωρὶς ὁρκωμοσίας εἰσὶν ἱερεῖς γεγονότες,
And none of this happened without an oath. For others became priests without an oath,