Sayyiduna Khuzaymah bin Thabit (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings of Allah be upon him) saying: "Indeed, Allah is not shy of speaking the truth. Do not have intercourse with women in their anuses."

It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) that the Jews said to the Muslims: "Whoever has intercourse with his wife from behind, his child will be born cross-eyed." So Allah Almighty revealed this noble verse: «﴿نِسَاؤُكُمْ حَرْثٌ لَكُمْ ......﴾» [البقره: 222/2] meaning, "Your wives are your fields, so come to your field as you wish."