Hebrews 6:16 in the World English Bible
For men indeed swear by a greater one, and in every dispute of theirs the oath is final for confirmation.
Context
15 And so, after he had patiently endured, he obtained the promise.
16 For men verily swear by the greater: and an oath for confirmation is to them an end of all strife.
17 Where in God, willing more abundantly to shew unto the heirs of promise the immutability of his counsel, confirmed it by an oath: