2 Corinthians 1:23

But I invoke God as a witness upon my soul, that, as sparing you, I came not yet to Corinth.

Hebrews 6:16

For men swear by the greater; and the oath for confirmation is an end, to them, of every dispute:

Treasury of Scripture Knowledge

Summary

Now therefore swear unto me here by God that thou wilt not deal falsely with me, nor with my son, nor with my son's son: but according to the kindness that I have done unto thee, thou shalt do unto me, and to the land wherein thou hast sojourned.

Bible References

Swear

2 Corinthians 1:23
But I invoke God as a witness upon my soul, that, as sparing you, I came not yet to Corinth.
Hebrews 6:16
For men swear by the greater; and the oath for confirmation is an end, to them, of every dispute: