Genesis 21:24

And Abraham said, "I swear."

Genesis 14:13

Then one who escaped came and told Abram the Hebrew. And he was living at the oaks of Mamre the Amorite, brother of Eshcol and brother of Aner. {They were allies with Abram}.

Romans 12:18

If [it is] possible on your [part], be at peace with all people.

Hebrews 6:16

For people swear by what is greater [than themselves], and the oath for confirmation [is the] end of all dispute for them.

Treasury of Scripture Knowledge

Summary

And Abraham said, I will swear.

Bible References

General references

Genesis 14:13
Then one who escaped came and told Abram the Hebrew. And he was living at the oaks of Mamre the Amorite, brother of Eshcol and brother of Aner. {They were allies with Abram}.
Romans 12:18
If [it is] possible on your [part], be at peace with all people.
Hebrews 6:16
For people swear by what is greater [than themselves], and the oath for confirmation [is the] end of all dispute for them.