Genesis 21:24

And Abraham said, I will swear.

Genesis 14:13

And there came one that had escaped, and told Abram the Hebrew; for he dwelt in the plain of Mamre the Amorite, brother of Eshcol, and brother of Aner: and these were confederate with Abram.

Romans 12:18

If it is possible, as much as lieth in you, live peaceably with all men.

Hebrews 6:16

For men verily swear by the greater: and an oath for confirmation is to them an end of all contradiction.

Treasury of Scripture Knowledge

Summary

And Abraham said, I will swear.

Bible References

General references

Genesis 14:13
And there came one that had escaped, and told Abram the Hebrew; for he dwelt in the plain of Mamre the Amorite, brother of Eshcol, and brother of Aner: and these were confederate with Abram.
Romans 12:18
If it is possible, as much as lieth in you, live peaceably with all men.
Hebrews 6:16
For men verily swear by the greater: and an oath for confirmation is to them an end of all contradiction.