Allah, exalted be His praise, says: "There is no sin upon you if you divorce women before you have touched them or fixed a dower for them, and (in that case) give them some provision (mut'ah)." [Surah al-Baqarah: 236]
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / Q14332