Isaiah 45:23

23 aBy myself I have sworn;
from my mouth has gone out in brighteousness
a word that shall not return:
cTo me every knee shall bow,
every tongue shall swear allegiance.’
Septuagint  every tongue shall confess to God

Hebrews 6:13

The Certainty of God’s Promise

13For when God made a promise to Abraham, since he had no one greater by whom to swear, ehe swore by himself,
Copyright information for ESV