"The Jews would say: "Whoever goes into his wife's vagina from behind her, then his children will be cross-eyed.' So Allah revealed: Your wives are a tilth for your, so go to your tilth when or how you will (2:223)."
سَمِعَ جَابِرًا يَقُولُ كَانَتِ الْيَهُودُ تَقُولُ مَنْ أَتَى امْرَأَتَهُ فِي قُبُلِهَا مِنْ دُبُرِهَا كَانَ الْوَلَدُ أَحْوَلَ فَنَزَلَتْ (نِسَاؤُكُمْ حَرْثٌ لَكُمْ فَأْتُوا حَرْثَكُمْ أَنَّى شِئْتُمْ )