Deuteronomy 24:1

IF anyone hath taken a wife, and cohabited with her, and it should happen that she hath not found favour in his sight, because he hath found something unseemly in her, he may write her a bill of divorce, and put it into her hands, and send her away from his house.

And if any one should take a wife, and should dwell with her, then it shall come to pass if she should not have found favour before him, because he has found some unbecoming thing in her, that he shall write for her a bill of divorcement, and give it into her hands, and he shall send her away out of his house.