'Swear' in the Bible

Swear to me by God here and now, that you will not break an agreement with me or with my children and descendants. As I have been loyal to you, so you will be loyal to me and to the country where you are a foreign resident.”

And Abraham said, “I swear it.”

and I will have you swear by the Lord, God of heaven and God of earth, that you will not take a wife for my son from the daughters of the Canaanites among whom I live,

Jacob said, “Swear to me first.” So he swore to Jacob and sold his birthright to him.

Then Joseph said, “I swear that I will not do this. The man in whose possession the cup was found will be my slave. The rest of you can go in peace to your father.”

And Jacob said, “Swear to me.” So Joseph swore to him. Then Israel bowed in thanks at the head of his bed.