Hebrews 6:13

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

Luke 1:73

the oath which he made to our father Abraham, to grant us this favour,

Hebrews 6:16-18

for when men swear by a superior, the ratifying what they say with an oath, puts an end to all further debate.

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 when men swear by a superior, the ratifying what they say with an oath, puts an end to all further debate.
Luke 1:73
the oath which he made to our father Abraham, to grant us this favour,

General references

Revelation 10:6
and sware by him that liveth for ever and ever, who created the heaven and all that is therein, the earth and all that is therein, the sea and all that is therein, "that the time should be no longer defer'd."