Genesis 21:31-32

21:31 That is why he named that place Beer Sheba, because the two of them swore an oath there.

21:32 So they made a treaty at Beer Sheba. Then Abimelech and Phicol, the commander of his army, returned to the land of the Philistines.

Genesis 24:3

24:3 so that I may make you solemnly promise by the Lord, the God of heaven and the God of the earth: You must not acquire a wife for my son from the daughters of the Canaanites, among whom I am living.

Genesis 24:41

24:41 You will be free from your oath if you go to my relatives and they will not give her to you. Then you will be free from your oath.’

Genesis 31:49-53

31:49 It was also called Mizpah because he said, “May the Lord watch between us when we are out of sight of one another. 31:50 If you mistreat my daughters or if you take wives besides my daughters, although no one else is with us, realize that God is witness to your actions.”

31:51 “Here is this pile of stones and this pillar I have set up between me and you,” Laban said to Jacob. 31:52 “This pile of stones and the pillar are reminders that I will not pass beyond this pile to come to harm you and that you will not pass beyond this pile and this pillar to come to harm me. 31:53 May the God of Abraham and the god of Nahor, the gods of their father, judge between us.” Jacob took an oath by the God whom his father Isaac feared.

Hebrews 6:16

6:16 For people swear by something greater than themselves, and the oath serves as a confirmation to end all dispute.