٥ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ الْبَرْقِيِّ عَنْ مُحَمَّدِ بْنِ أَسْلَمَ الْجَبَلِيِّ عَنْ صَبَّاحٍ الْحَذَّاءِ عَنْ إِسْحَاقَ بْنِ عَمَّارٍ قَالَ سَأَلْتُ أَبَا الْحَسَنِ (عَلَيْهِ الْسَّلام) عَنْ قَوْمٍ خَرَجُوا فِي سَفَرٍ فَلَمَّا انْتَهَوْا إِلَى الْمَوْضِعِ الَّذِي يَجِبُ عَلَيْهِمْ فِيهِ التَّقْصِيرُ قَصَّرُوا مِنَ الصَّلاَةِ فَلَمَّا صَارُوا عَلَى فَرْسَخَيْنِ أَوْ عَلَى ثَلاَثَةِ فَرَاسِخَ أَوْ أَرْبَعَةٍ تَخَلَّفَ عَنْهُمْ رَجُلٌ لاَ يَسْتَقِيمُ لَهُمْ سَفَرُهُمْ إِلاَّ بِهِ فَأَقَامُوا يَنْتَظِرُونَ مَجِيئَهُ إِلَيْهِمْ وَهُمْ لاَ يَسْتَقِيمُ لَهُمُ السَّفَرُ إِلاَّ بِمَجِيئِهِ إِلَيْهِمْ فَأَقَامُوا عَلَى ذَلِكَ أَيَّاماً لاَ يَدْرُونَ هَلْ يَمْضُونَ فِي سَفَرِهِمْ أَوْ يَنْصَرِفُونَ هَلْ يَنْبَغِي لَهُمْ أَنْ يُتِمُّوا الصَّلاَةَ أَوْ يُقِيمُوا عَلَى تَقْصِيرِهِمْ قَالَ إِنْ كَانُوا بَلَغُوا مَسِيرَةَ أَرْبَعَةِ فَرَاسِخَ فَلْيُقِيمُوا عَلَى تَقْصِيرِهِمْ أَقَامُوا أَمِ انْصَرَفُوا وَإِنْ كَانُوا سَارُوا أَقَلَّ مِنْ أَرْبَعَةِ فَرَاسِخَ فَلْيُتِمُّوا الصَّلاَةَ أَقَامُوا أَوِ انْصَرَفُوا فَإِذَا مَضَوْا فَلْيُقَصِّرُوا. 
5. A number of our people have narrated from Ahmad ibn Muhammad from al-Barqiy, from Muhammad ibn Aslam al-Jabaliy from Sabbah al-Hadhdha’ from Ishaq ibn ‘Ammar who has said the following: “I once asked abu al-Hassan , about the case of a people who are on a journey. When they arrived at the place where they were required to perform their Salah (prayer) in a reduced form, they reduced their Salah (prayer). After traveling two, three, or four farsakh, one of them without whom their journey could not be done remained behind. They waited for his arrival. Without him their journey was not possible. They stayed there for many days without knowing to go forward or return. Are they required to perform their Salah (prayer) complete or reduce it?’ He (the Imam) said, ‘If they have traveled four farsakh they reduce their Salah (prayer), regardless, they stay there or return. If they have traveled less than four farsakh, they perform their Salah (prayer) complete, regardless, they stay there or return.”’ 