He -asws said: ‘So what Prohibits the egg upon you and Permits the chicken for you?’ ثُمَّ قَالَ ( عليه السلام ) فَكَذَلِكَ الْإِنْفَحَةُ مِثْلُ الْبَيْضَةِ فَاشْتَرِ الْجُبُنَّ مِنْ أَسْوَاقِ الْمُسْلِمِينَ مِنْ أَيْدِي الْمُصَلِّينَ وَ لَا تَسْأَلْ عَنْهُ إِلَّا أَنْ يَأْتِيَكَ مَنْ يُخْبِرُكَ عَنْهُ . Then he -asws said: ‘So that rennet is like the egg.
So buy the cheese from the markets of the Muslim, from the hand of the Praying one, and do not ask about it except if there comes to you one who informs you about it’.
Ali Bin Ibrahim, from his father, from Ismail Bin Marrar, from Yunus, (It has been narrated) from them -asws having said: ‘Five things are pure from wherein is benefit for the people – the rennet, and the egg, and the wool, and the hair, and the fur.
There is no problem with eating the cheese, all of these from what the Muslim had made, or others, and rather it is disliked to eat, except for the rennet, from what is in the vessels (cooking pots) of the Magians, and the People of the Book, because they do not consider the dead and the wine’ (they eat all of these).
A number of our companions, from Ahmad Bin Muhammad Bin Khalid, from one of his companions, raising it, said, ‘Abu Abdullah -asws said: ‘Two things are corrective, either of which does not enter the inside at all as spoilt except that it corrects it, and two things are both spoilers, they do not enter inside at all as correct, except that they spoil it.