2 Corinthians 1:23

But I call on God as a witness against my soul, that wishing to spare you, I did not go to Corinth;

Hebrews 6:16

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

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 call on God as a witness against my soul, that wishing to spare you, I did not go to Corinth;
Hebrews 6:16
For, verily, men swear by the greater, and an oath for confirmation is to them an end of all contradiction.