Jabir (Allah be pleased with him) 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 squint, so the verse came down:" Your wives are your tilth; go then unto your tilth as you may desire" (ii. 223)

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، وَأَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ وَعَمْرٌو النَّاقِدُ - وَاللَّفْظُ لأَبِي بَكْرٍ - قَالُوا حَدَّثَنَا سُفْيَانُ عَنِ ابْنِ الْمُنْكَدِرِ سَمِعَ جَابرًا يَقُولُ كَانَتِ الْيَهُودُ تَقُولُ إِذَا أَتَى الرَّجُلُ امْرَأَتَهُ مِنْ دُبُرِهَا فِي قُبُلِهَا كَانَ الْوَلَدُ أَحْوَلَ فَنَزَلَتْ ‏{‏ نِسَاؤُكُمْ حَرْثٌ لَكُمْ فَأْتُوا حَرْثَكُمْ أَنَّى شِئْتُمْ‏}‏