When the verse: "O ye who believe! eat not up your property among yourselves in vanities, but let there be amongst you traffic and trade by mutual good will" was revealed, a man thought it a sin to eat in the house of another man after the revelation of this verse. Then this (injunction) was revealed by the verse in Surat an-Nur: "No blame on you whether you eat in company or separately." When a rich man (after revelation) invited a man from his people to eat food in his house, he would say: I consider it a sin to eat from it, and he said: a poor man is more entitled to it than I. The Arabic word tajannah means sin or fault. It was then declared lawful to eat something on which the name of Allah was mentioned, and it was made lawful to eat the flesh of an animal slaughtered by the people of the Book.  

{ لاَ تَأْكُلُوا أَمْوَالَكُمْ بَيْنَكُمْ بِالْبَاطِلِ إِلاَّ أَنْ تَكُونَ تِجَارَةً عَنْ تَرَاضٍ مِنْكُمْ } فَكَانَ الرَّجُلُ يُحْرَجُ أَنْ يَأْكُلَ عِنْدَ أَحَدٍ مِنَ النَّاسِ بَعْدَ مَا نَزَلَتْ هَذِهِ الآيَةُ فَنَسَخَ ذَلِكَ الآيَةُ الَّتِي فِي النُّورِ قَالَ { لَيْسَ عَلَيْكُمْ جُنَاحٌ } { أَنْ تَأْكُلُوا مِنْ بُيُوتِكُمْ } إِلَى قَوْلِهِ { أَشْتَاتًا } كَانَ الرَّجُلُ الْغَنِيُّ يَدْعُو الرَّجُلَ مِنْ أَهْلِهِ إِلَى الطَّعَامِ قَالَ إِنِّي لأَجَّنَّحُ أَنْ آكُلَ مِنْهُ وَالتَّجَنُّحُ الْحَرَجُ وَيَقُولُ الْمِسْكِينُ أَحَقُّ بِهِ مِنِّي فَأُحِلَّ فِي ذَلِكَ أَنْ يَأْكُلُوا مِمَّا ذُكِرَ اسْمُ اللَّهِ عَلَيْهِ وَأُحِلَّ طَعَامُ أَهْلِ الْكِتَابِ