Hadith 10:101
Jabir declared that the Jews used to say:
“When a man has intercourse with his wife through the vagina, but being on her back, the child will have a squint,” so the verse came down, “Your wives are a tilth to you, so come to your tilth however you will” (Al-Qur’an 2:223). (Bukhari and Muslim.)
عَنْ جَابِرٍ قَالَ: كَانَتِ الْيَهُودُ تَقُولُ: إِذَا أَتَى الرَّجُلُ امْرَأَتَهُ مِنْ دُبُرِهَا فِي قُبُلِهَا كَانَ الْوَلَد أَحول فَنزلت: (نساوكم حرث لكم فَأتوا حَرْثكُمْ أَنى شِئْتُم)
Original Reference: Mishkat al-Masabih 3183