 أَبِی ره قَالَ حَدَّثَنَا سَعْدُ بْنُ عَبْدِ اللَّهِ عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ أَبِی عَبْدِ اللَّهِ عَنْ أَبِی الْجَوْزَاءِ عَنِ الْحُسَیْنِ بْنِ عُلْوَانَ عَنْ مُنْذِرٍ عَنْ أَبِی عَبْدِ اللَّهِ ع قَالَ: ذُکِرَ أَنَّ سلیمان [سَلْمَانَ] قَالَ إِنَّ رَجُلًا دَخَلَ الْجَنَّهَ فِی ذُبَابٍ وَ آخَرَ دَخَلَ النَّارَ فِی ذُبَابٍ وَ قِیلَ لَهُ وَ کَیْفَ ذَا یَا أَبَا عَبْدِ اللَّهِ قَالَ مَرَّ عَلَی قَوْمٍ فِی عِیدٍ لَهُمْ وَ قَدْ وَضَعُوا أَصْنَاماً لَهُمْ لَا یَجُوزُ بِهِمْ أَحَدٌ حَتَّی یُقَرِّبَ إِلَی أَصْنَامِهِمْ قُرْبَاناً قَلَّ أَمْ کَثُرَ فَقَالُوا لَهُمَا لَا تَجُوزَا حَتَّی تُقَرِّبَا کَمَا یُقَرِّبُ کُلُّ مَنْ مَرَّ فَقَالَ أَحَدُهُمَا مَا مَعِی شَیْ ءٌ أُقَرِّبُهُ وَ أَخَذَ أَحَدُهُمَا ذُبَاباً فَقَرَّبَهُ وَ لَمْ یُقَرِّبِ الْآخَرُ فَقَالَ لَا أُقَرِّبُ إِلَی غَیْرِ اللَّهِ عَزَّ وَ جَلَّ شَیْئاً فَقَتَلُوهُ فَدَخَلَ الْجَنَّهَ وَ دَخَلَ الْآخَرُ النَّارَ.
1. My father (rah) said: it was narrated to us by Sa’d b. Abdillah from Ahmad b. Muhammad from Abi Abdillah from Abi al-Jawzaa’ from al-Hussain b. Alwan from Mundhir from Abi Abdillah  who said: The narrator asked Imam Ja’far Sadiq , “O Master! How is it possible that a person goes to Paradise because of a house fly and another into Hell because of it?” Imam  replied, “These two persons went to a tribe, which was celebrating a feast on that day. That tribe had an idol and none was allowed to go near it without offering a sacrifice. However there was no restriction on the size of sacrifice. The tribe refused to permit them passage unless they offered a sacrifice. One of those two persons said that he didn’t have anything to sacrifice. Then he caught a fly, killed it and offered it as a sacrifice while other companion refused to sacrifice even a fly for the sake of anyone except Allah. The tribal people killed him and he entered Paradise. On the other hand, the person who was left alive got punished in Hell.”