Deuteronomy 24:1

24:1 When a man takes a wife, and marries her, then it shall be, if she find no favor in his eyes, because he has found some unseemly thing in her, that he shall write her a bill of divorce, and give it in her hand, and send her out of his house.
-World English Bible

Other Translation

24:1 When a man hath taken a wife, and married her, and it come to pass that she find no favour in his eyes, because he hath found some uncleanness in her: then let him write her a bill of divorcement, and give [it] in her hand, and send her out of his house.
-King James Version