Sahih Muslim
The Book of Marriage (Kitab Al-Nikah)
Book Number: 008 / Hadith Number: 3266
'Ali (Allah be pleased with him) heard that Ibn Abbas (Allah be pleased with them) gave some relaxation in connection with the contracting of temporary marriage, whereupon he said: Don't be hasty (in your religious verdict), Ibn 'Abbas, for Allah's Messenger (may peace be upon him) on the Day of Khaibar prohibited for ever the doing of it-And eating of the flesh of domestic asses.