'Swear' in the Bible

so now, swear to me here by God that you will not deal unfairly with me [by breaking any agreements we have] or with my son or with my descendants, but as I have treated you with kindness, you shall do the same to me and to the land in which you have sojourned (temporarily lived).”

And Abraham said, “I will swear.”

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

My master made me swear [an oath], saying, ‘You must not take a wife for my son from the daughters of the Canaanites, in whose land I live;

Jacob said, “Swear [an oath] to me today [that you are selling it to me for this food]”; so he swore [an oath] to him, and sold him his birthright.

Then he said, “Swear to me [that you will do it].” So he swore to him. Then Israel (Jacob) bowed in worship at the head of the bed.

‘My father made me swear [an oath], saying, “Hear me, I am about to die; bury me in my tomb which I prepared for myself in the land of Canaan.” So now let me go up [to Canaan], please, and bury my father; then I will return.’”

And Pharaoh said, “Go up and bury your father, as he made you swear.”