٩ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ حَمَّادِ بْنِ عُثْمَانَ عَنْ يَحْيَى الأَزْرَقِ عَنْ أَبِي الْحَسَنِ (عَلَيْهِ السَّلاَم) قَالَ قُلْتُ لَهُ إِنِّي طُفْتُ أَرْبَعَةَ أَسَابِيعَ فَأَعْيَيْتُ أَ فَأُصَلِّي رَكَعَاتِهَا وَأَنَا جَالِسٌ قَالَ لا قُلْتُ فَكَيْفَ يُصَلِّي الرَّجُلُ إِذَا اعْتَلَّ وَوَجَدَ فَتْرَةً صَلاةَ اللَّيْلِ جَالِساً وَهَذَا لا يُصَلِّي قَالَ فَقَالَ يَسْتَقِيمُ أَنْ تَطُوفَ وَأَنْتَ جَالِسٌ قُلْتُ لا قَالَ فَصَلِّ وَأَنْتَ قَائِمٌ. 
9. A number of our people have narrated from Sahl ibn Ziyad from Ahmad ibn Muhammad from Hammad ibn ‘Isa from Yahya al- Arzaq who has said the following: “I once asked abu al-Hassan , about my performing Tawaf in which after the fourth round of walking around the House I became tired: if I could perform its two Rak‘at Salat (prayer) in a sitting position. He (the Imam) said, ‘No, you cannot do so.’ I then asked, ‘What should a person do in such case while in Salat (prayer) of night. In this case if one feels weakness, it is permissible to perform them in sitting position, and in this case it is not permissible.’ He (the Imam) said, ‘Is it right to perform Tawaf and you are sitting?’ I replied, ‘No, it is not right.’ He (the Imam) then said, ‘Perform Salat (prayer) while you are standing.’” 