KHUL خلع
An agreement entered into for the purpose of dissolving marriage. The release from the marriage tie obtained by a wife upon payment of a compensation or consideration. In the Hidayah it is said: “Whenever enmity takes place between husband and wife, and they both see reason to apprehend the ends of marriage are not likely to be answered by a continuance of their union, the woman need not scruple to release herself from the power of her husband, by offering such a compensation as may induce him to liberate her.” In the event of a woman desiring this form of divorce, she is not entitled to the repayment of her dower. This law is laid down in the Qur’an: “If ye fear that they cannot observe the ordinances of God, then no blame shall attach to either of you for what the wife shall herself give for her redemption.” (Surah ii. 229.)

Based on Hughes, Dictionary of Islam