Hebrews 6:13

For God when he gave the promise to Abraham forasmuch as he had nothing greater to swear by, sware by himself,

Luke 1:73

the oath which he sware to Abraham our father,

Hebrews 6:16-18

For men indeed swear by something greater than themselves; and an oath for confirmation is with them conclusive in all disputes.

Treasury of Scripture Knowledge

Summary

For when God made promise to Abraham, because he could swear by no greater, he sware by himself,

General references

Bible References

He sware

Hebrews 6:16
For men indeed swear by something greater than themselves; and an oath for confirmation is with them conclusive in all disputes.
Luke 1:73
the oath which he sware to Abraham our father,

General references

Revelation 10:6
and he swore by him that liveth for ever and ever, who created the heaven and the things which are therein, and the earth and the things which are in it, and the sea, and the things which are therein, that time shall be no longer: