Genesis 21:31-32

21:31 Wherefore he called that place Beersheba; because there they sware both of them. 21:32 Thus they made a covenant at Beersheba: then Abimelech rose up, and Phichol the chief captain of his host, and they returned into the land of the Philistines.

Genesis 24:3

24:3 And I will make thee swear by the LORD, the God of heaven, and the God of the earth, that thou shalt not take a wife unto my son of the daughters of the Canaanites, among whom I dwell:

Genesis 24:41

24:41 Then shalt thou be clear from [this] my oath, when thou comest to my kindred; and if they give not thee [one], thou shalt be clear from my oath.

Genesis 31:49-53

31:49 And Mizpah; for he said, The LORD watch between me and thee, when we are absent one from another. 31:50 If thou shalt afflict my daughters, or if thou shalt take [other] wives beside my daughters, no man [is] with us; see, God [is] witness betwixt me and thee. 31:51 And Laban said to Jacob, Behold this heap, and behold [this] pillar, which I have cast betwixt me and thee; 31:52 This heap [be] witness, and [this] pillar [be] witness, that I will not pass over this heap to thee, and that thou shalt not pass over this heap and this pillar unto me, for harm. 31:53 The God of Abraham, and the God of Nahor, the God of their father, judge betwixt us. And Jacob sware by the fear of his father Isaac.

Hebrews 6:16

6:16 For men verily swear by the greater: and an oath for confirmation [is] to them an end of all strife.