538. hadíth
وَ بِهَذَا الْإِسْنَادِ عَنْ أَحْمَدَ بْنِ أَبِی عَبْدِ اللَّهِ عَنْ أَبِی عَبْدِ اللَّهِ ع قَالَ: لَوْ جَرَی الْمَعْرُوفُ عَلَی ثَمَانِینَ کَفّاً لَأُجِرُوا کُلُّهُمْ مِنْ غَیْرِ أَنْ یَنْقُصَ مِنْ صَاحِبِهِ مِنْ أَجْرِهِ شَیْئاً.
14. And from the previous chain from Ahmad b. Abi Abdillah from Abi Abdillah (a.s.) who said: “If eighty people do a good deed together each person will get the reward equal to that of all the people without decrease in the reward of any one of them.”