٤ـ مُحَمَّدُ بْنُ إِسْمَاعِيلَ عَنِ الْفَضْلِ بْنِ شَاذَانَ وَعَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ جَمِيعاً عَنْ حَمَّادِ بْنِ عِيسَى عَنْ حَرِيزٍ عَنْ زُرَارَةَ قَالَ قُلْتُ لأَبِي جَعْفَرٍ (عَلَيْهِ الْسَّلام) يُصَلِّي الرَّجُلُ بِوُضُوءٍ وَاحِدٍ صَلاَةَ اللَّيْلِ وَالنَّهَارِ كُلَّهَا قَالَ نَعَمْ مَا لَمْ يُحْدِثْ قُلْتُ فَيُصَلِّي بِتَيَمُّمٍ وَاحِدٍ صَلاَةَ اللَّيْلِ وَالنَّهَارِ كُلَّهَا قَالَ نَعَمْ مَا لَمْ يُحْدِثْ أَوْ يُصِبْ مَاءً قُلْتُ فَإِنْ أَصَابَ الْمَاءَ وَرَجَا أَنْ يَقْدِرَ عَلَى مَاءٍ آخَرَ وَظَنَّ أَنَّهُ يَقْدِرُ عَلَيْهِ كُلَّمَا أَرَادَ فَعَسُرَ ذَلِكَ عَلَيْهِ قَالَ يَنْقُضُ ذَلِكَ تَيَمُّمَهُ وَعَلَيْهِ أَنْ يُعِيدَ التَّيَمُّمَ قُلْتُ فَإِنْ أَصَابَ الْمَاءَ وَقَدْ دَخَلَ فِي الصَّلاَةِ قَالَ فَلْيَنْصَرِفْ وَلْيَتَوَضَّأْ مَا لَمْ يَرْكَعْ فَإِنْ كَانَ قَدْ رَكَعَ فَلْيَمْضِ فِي صَلاَتِهِ فَإِنَّ التَّيَمُّمَ أَحَدُ الطَّهُورَيْنِ.
4. Muhammad ibn ’Isma‘il has narrated from al-Fadl ibn Shadhan and Ali ibn Ibrahim has narrated from his father all from Hammad ibn ‘Isa from Hariz from Zurarah who has said the following: “I once asked abu Ja‘far , ‘Can one perform with a single Wudu’ the Salah (prayer) of a whole day and night? He (the Imam) said, ‘It is permissible as long as one has a valid Wudu’.’ I then asked, ‘Is it permissible in the case of one Tayammum also? He (the Imam) said, ‘Yes, it is permissible as long as one has a valid Wudu’ and still has not found water.’ I then asked, ‘What is one’s duty if water is found or has hopes to be able to find other water and has a greater hope to find water when one would want but it then becomes difficult?’ He (the Imam) said, ‘In such case Wudu’ becomes invalid therefore; Tayammum must be taken again.’ I then asked, ‘What is the obligation if water is found when one is performing Salah (prayer)?’ He (the Imam) said, ‘It must be discontinued to take Wudu’ if one has not yet assumed the position of Ruku‘; once already in the position of Ruku‘, Salah (prayer) must be continued; Tayammum is one of the two forms of Taharat (cleansing).”’ 