Verses with the word swearing in the Old Testament (4 verses):

Leviticus 5:1
And if a soul sin, and hear the voice of swearing, and is a witness, whether he hath seen or known of it; if he do not utter it, then he shall bear his iniquity.

Jeremiah 23:10
For the land is full of adulterers; for because of swearing the land mourneth; the pleasant places of the wilderness are dried up, and their course is evil, and their force is not right.

Hosea 4:2
By swearing, and lying, and killing, and stealing, and committing adultery, they break out, and blood toucheth blood.

Hosea 10:4
They have spoken words, swearing falsely in making a covenant: thus judgment springeth up as hemlock in the furrows of the field.