Oaths used for Confirming Covenants
Source: TTT
Genesis 26:28
“We can plainly see that the LORD has been with you,” they replied. “We recommend that there should now be an oath between us and you. Let us make a covenant with you
Genesis 31:44, 53
Come now, let us make a covenant, you and I, and let it serve as a witness between you and me.” / May the God of Abraham and the God of Nahor, the God of their father, judge between us.” So Jacob swore by the Fear of his father Isaac.
1 Samuel 20:16, 17
So Jonathan made a covenant with the house of David, saying, “May the LORD hold David’s enemies accountable.” / And Jonathan had David reaffirm his vow out of love for him, for Jonathan loved David as he loved himself.