2 Corinthians 1:23

I call God to witness against my soul, it was to spare you that I refrained from revisiting Corinth.

Hebrews 6:16

For as men swear by a greater than themselves, and as an oath means to them a guarantee that ends any 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
I call God to witness against my soul, it was to spare you that I refrained from revisiting Corinth.
Hebrews 6:16
For as men swear by a greater than themselves, and as an oath means to them a guarantee that ends any dispute,