سُئِلَ أَبُو عَبْدِ اللَّهِ ع وَ أَنَا حَاضِرٌ عِنْدَهُ عَنْ جَدْيٍ يَرْضِعُ مِنْ خِنْزِيرَةٍ حَتَّى كَبِرَ وَ شَبَّ وَ اشْتَدَّ عَظْمُهُ ثُمَّ إِنَّ رَجُلًا اسْتَفْحَلَهُ فِي غَنَمِهِ فَأُخْرِجَ لَهُ نَسْلٌ فَقَالَ أَمَّا مَا عَرَفْتَ مِنْ نَسْلِهِ بِعَيْنِهِ فَلَا تَقْرَبَنَّهُ وَ أَمَّا مَا لَمْ تَعْرِفْهُ فَكُلْهُ فَهُوَ بِمَنْزِلَةِ الْجُبُنِّ وَ لَا تَسْأَلْ عَنْهُ[3].
“Once abu ‘ Abd Allah (a.s.), was asked, when I was with him (the Imam) about the young goat fed with milk from pigs until it grew up and became of strong bones; then a man used it for impregnating the flock of his sheep and young were produced. He (the Imam) said, ‘If you can find out its offspring exactly, then do no