Hebrews 6:13

Weymouth NT

For when God gave the promise to Abraham, since He had no one greater to swear by, He swore by Himself,

Cross References

Luke 1:73

The oath which He swore to Abraham our forefather,

Galatians 3:15

Brethren, even a covenant made by a man –to borrow an illustration from daily life– when once formally sanctioned is not liable to be set aside or added to.

Galatians 3:18

For if the inheritance comes through obedience to Law, it no longer comes because of a promise. But, as a matter of fact, God has granted it to Abraham in fulfilment of a promise.