I heard Jabir say, "The Jews used to say that if a man had intercourse with his wife in her vagina from behind, the child would be cross-eyed. So Allah revealed, 'Your wives are a tilth for you, so come to your tilth as you wish' [Baqarah 2:223]."
حدثنا ابن بشار حدثنا عبد الرحمن حدثنا سفيان
سمعت جابرا يقول إن اليهود يقولون إذا جامع الرجل أهله في فرجها من ورائها كان ولده أحول فأنزل الله سبحانه وتعالى {نساؤكم حرث لكم فأتوا حرثكم أنى شئتم}
Muslim narrated it, in the Book of Marriage, chapter on the permissibility of a man having intercourse with his wife in her vagina, hadith no. 1435, from the hadith of Abdul-Rahman bin Mahdi, and Bukhari, in the Book of Tafsir, chapter on "Your wives are a place of cultivation for you, so come to your cultivation however you wish."