٤ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ مُحَمَّدِ بْنِ أَحْمَدَ عَنْ مُحَمَّدِ بْنِ عِيسَى عَنْ مُحَمَّدِ بْنِ رَجَاءٍ الأَرَّجَانِيِّ قَالَ كَتَبْتُ إِلَى الطَّيِّبِ (عَلَيْهِ السَّلاَم) أَنِّي كُنْتُ فِي الْمَسْجِدِ الْحَرَامِ فَرَأَيْتُ دِينَاراً فَأَهْوَيْتُ إِلَيْهِ لآِخُذَهُ فَإِذَا أَنَا بِآخَرَ ثُمَّ بَحَثْتُ الْحَصَى فَإِذَا أَنَا بِثَالِثٍ فَأَخَذْتُهَا فَعَرَّفْتُهَا فَلَمْ يَعْرِفْهَا أَحَدٌ فَمَا تَرَى فِي ذَلِكَ فَكَتَبَ فَهِمْتُ مَا ذَكَرْتَ مِنْ أَمْرِ الدَّنَانِيرِ فَإِنْ كُنْتَ مُحْتَاجاً فَتَصَدَّقْ بِثُلُثِهَا وَإِنْ كُنْتَ غَنِيّاً فَتَصَدَّقْ بِالْكُلِّ. 
4. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn ‘Isa from Muhammad ibn Raja’ al-Arjaniy who has said the following: “Once I wrote to al-Tayyib , this, ‘I was in Masjid al-Haram and I saw a dinar. I bent down to take it and there was another dinar. I searched in the pebbles and found a third one. I took them and publicized but no one knows them. What is your instruction? He (the Imam) wrote back to me, ‘I understood the case of dinars. If you are needy give one-third of it in charity, if you are not needy give all of them in charity.’” 