Hebrews 3:18

18And to whom did he swear that athey would not enter his rest, but to those who were disobedient?

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, bhe swore by himself,

Hebrews 6:17

17So when God desired to show more convincingly to cthe heirs of the promise dthe unchangeable character of his purpose, ehe guaranteed it with an oath,
Copyright information for ESV