١ - حَدَّثَنَا أبِي رَضِيَ اللهُ عَنْهُ قَالَ حَدَّثَنَا سَعْدُ بْنُعَبْدِ اللهِ عَنْ مُحَمَّدِ بْنِ جَزَكَ عَنْ يَاسِرٍ الخَادِمِ قَالَ كَانَ غُلْمَانٌ لأبِي الْحَسَنِ عَلَيْهِ السَّلاَمُ فِي الْبَيْتِ صَقَالِبَةً وَرُومِيَّةً وَكَانَ أبُو الْحَسَنِ عَلَيْهِ السَّلاَمُ قَرِيباً مِنْهُمْ فَسَمِعَهُمْ بِاللَّيْلِ يَتَرَاطَنُونَ بِالصَّقْلَبِيَّةِ وَالرُّومِيَّةِ وَيَقُولُونَ إنّا كُنَّا نَفْتَصِدُ فِي كُلِّ سَنَةٍ فِي بِلادِنَا ثُمَّ لَيْسَ نَفْتَصِدُ هَاهُنَا فَلَمَّا كَانَ مِنَ الْغَدِ وَجَّهَ أبُو الْحَسَنِ إلى بَعْضِ الأطِبَّاءِ فَقَالَ لَهُ افْصُدْ فُلاناً عِرْقَ كَذا وَافْصُدْ فُلاناً عِرْقَ كَذَا وَافْصُدْ فُلاناً عِرْقَ كَذا وَافْصُدْ هَذا عِرْقَ كَذَا. ثُمَّ قَالَ: يَا يَاسِرُ لا تَفْتَصِدُ أنْتَ؟ قَالَ فَافْتَصَدْتُ فَوَرُمَتْ يَدِي وَاحْمَرَّتْ. فَقَالَ لِي يَا يَاسِرُ مَالَكَ؟ فَأخْبَرْتُهُ. فَقَالَ: أَلَمْ أنْهَكَ عَنْ ذَلِكَ؟ هَلُمَّ يَدَكَ. فَمَسَحَ يَدَهُ عَلَيْهَا وَتَفَلَ فِيهَا ثُمَّ أوْصَانِي أنْ لا أتَعَشَّى. فَمَكَثْتُ بَعْدَ ذَلِكَ مَا شَاءَ اللهُ لا أتَعَشَّى ثُمَّ أُغَافِلُ فَأتَعَشَّى فَيَضْرِبُ عَلَيَّ.
54-1 (The author of the book narrated) my father - may God be pleased with him - narrated that Sa’d ibn Abdullah quoted on the authority of Muhammad ibn Jazak, on the authority of Yasir - the servant, “There were servants in Abal Hassan Ar-Ridha’’s  home who were Slavic and Roman. Abul Hassan’s  room was near theirs. One night Imam Ar-Ridha’  heard them say in the Slavic and Roman languages, ‘We used to donate blood once a year when we were in our own towns. However, we have never donated any blood for the many years that we have been here.’ Then when the morning came, Abal Hassan Ar-Ridha’  called in some doctors and told them to take blood from each of those servants. He precisely instructed the doctors as to which of the veins to use for each of the servants. Then he  told me, ‘O Yasir! You should not donate blood.’ However, I did not pay any attention to the Imam  and donated blood. However, my hand swelled up and turned purple. Ar-Ridha’  asked me, ‘What has happened to you?’ I answered, ‘I donated blood.” The Imam  asked, ‘Did I not admonish you against donating blood? Please bring your hand forward.’ I put my hand forward. Then the Imam  rubbed his hands on my hand and spit on it. Then the Imam  ordered me not to eat dinner for a while. I tried not to eat dinner at night as much as I could. Whenever I failed to do so and ate something for dinner, that pain returned.”