'Oath' in the Bible

(for he is a merciful God), he will not let you down or destroy you, for he cannot forget the covenant with your ancestors that he confirmed by oath to them.

You must remember the Lord your God, for he is the one who gives ability to get wealth; if you do this he will confirm his covenant that he made by oath to your ancestors, even as he has to this day.

It is not because of your righteousness, or even your inner uprightness, that you have come here to possess their land. Instead, because of the wickedness of these nations the Lord your God is driving them out ahead of you in order to confirm the promise he made on oath to your ancestors, to Abraham, Isaac, and Jacob.

so that you may enter by oath into the covenant the Lord your God is making with you today.

Today he will affirm that you are his people and that he is your God, just as he promised you and as he swore by oath to your ancestors Abraham, Isaac, and Jacob.

It is not with you alone that I am making this covenant by oath,

When such a person hears the words of this oath he secretly blesses himself and says, "I will have peace though I continue to walk with a stubborn spirit." This will destroy the watered ground with the parched.