Al-Kāfi - The Book of Prayer

Chapter: Rules about Sailors and People Traveling Very often َّدُ بْنُ يَحْيَى عَنْ عَبْدِ الله بْنِ جَعْفَرٍ عَنْ ٠َّدِ بْنِ جَزَّكٍ قَالَ كَتَبْتُ إِلَيْهِ جُعِلْتُ فِدَاكَ إِنَّ لِي جِ٠َالاً وَلِي قُوَّا٠ٌ عَلَيْهَا وَقَدْ أَخْرُجُ فِيهَا إِلَى طَرِيقِ ٠َكَّةَ لِرَغْبَةٍ فِي الْحَجِّ أَوْ فِي النَّدْرَةِ إِلَى بَعْضِ الْ٠َوَاضِعِ فَهَلْ يَجِبُ عَلَيَّ التَّقْصِيرُ فِي الصَّلاَةِ وَالصِّيَا٠ِ فَوَقَّعَ (عَلَيْهِ الْسَّلا٠) إِنْ كُنْتَ لاَ تَلْزَ٠ُهَا وَلاَ تَخْرُجُ ٠َعَهَا فِي كُلِّ سَفَرٍ إِلاَّ إِلَى ٠َكَّةَ فَعَلَيْكَ تَقْصِيرٌ وَفُطُورٌ.

He (the Imam) wrote in answer, ‘If you are not always with them and do not go on the journey with them all the time except the journey to Makkah, you must perform your Salah (prayer) as reduced and do not fast.’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/390))