Prayer During Travel
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 59
وَ رَوَى مُعَاوِيَةُ بْنُ وَهْبٍ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ أَنَّهُ قَالَ: «إِذَا دَخَلْتَ بَلَداً وَ أَنْتَ تُرِيدُ اَلْمُقَامَ عَشَرَةَ أَيَّامٍ فَأَتِمَّ اَلصَّلاَةَ حِينَ تَقْدَمُ وَ إِنْ أَرَدْتَ اَلْمُقَامَ دُونَ اَلْعَشَرَةِ فَقَصِّرْ وَ إِنْ أَقَمْتَ تَقُولُ غَداً أَخْرُجُ وَ بَعْدَ غَدٍ وَ لَمْ تُجْمِعْ عَلَى عَشَرَةٍ فَقَصِّرْ مَا بَيْنَكَ وَ بَيْنَ شَهْرٍ فَإِذَا تَمَّ اَلشَّهْرُ فَأَتِمَّ اَلصَّلاَةَ» قَالَ قُلْتُ إِنْ دَخَلْتُ بَلَداً أَوَّلَ يَوْمٍ مِنْ شَهْرِ رَمَضَانَ وَ لَسْتُ أُرِيدُ أَنْ أُقِيمَ عَشْراً فَقَالَ «قَصِّرْ وَ أَفْطِرْ» قُلْتُ فَإِنْ مَكَثْتُ كَذَلِكَ أَقُولُ غَداً أَوْ بَعْدَ غَدٍ فَأُفْطِرُ اَلشَّهْرَ كُلَّهُ وَ أَقْصُرُ قَالَ «نَعَمْ هَذَا وَاحِدٌ إِذَا قَصَرْتَ أَفْطَرْتَ وَ إِذَا أَفْطَرْتَ قَصَرْتَ.
Mu'awiyah ibn Wahb reported from Imam Abu Abdullah عليه السلام that He said: "If you enter a town and intend to stay there for ten days, then you must perform the full prayer as soon as you arrive. But if you intend to stay for less than ten days, you should shorten the prayer. If you keep saying 'Tomorrow I will leave' and 'The day after tomorrow' without deciding to stay for ten days, then you continue to shorten the prayer until it reaches a month ; after a month, you should perform the full prayer." He (the narrator) said: "I asked: If I enter a town on the first day of Ramadan and I do not intend to stay for ten days, what should I do?" Imam عليه السلام replied: "Shorten your prayer and break your fast." He (the narrator) asked: "If I continue in this state, always saying 'Tomorrow' or 'The day after tomorrow,' should I break the fast for the entire month and continue to shorten my prayers?" Imam عليه السلام said: "Yes, it is one rule: If you shorten your prayer, you break your fast, and if you break your fast, you shorten your prayer."
- Ṣaḥīḥ al-Faqīh, p. 62