Man Lā Yaḥḍuruh al-Faqīh
Hadith 12901298 - وَ سَأَلَ عَلِيُّ بْنُ يَقْطِينٍ ، أَبَا اَلْحَسَنِ عَلَيْهِ اَلسَّلاَمُ: عَنِ اَلرَّجُلِ يَخْرُجُ فِي اَلسَّفَرِ ثُمَّ يَبْدُو لَهُ فِي اَلْإِقَامَةِ وَ هُوَ فِي اَلصَّلاَةِ قَالَ «يُتِمُّ إِذَا بَدَتْ لَهُ اَلْإِقَامَةُ»
وَ عَنِ اَلرَّجُلِ يُشَيِّعُ أَخَاهُ إِلَى اَلْمَكَانِ اَلَّذِي يَجِبُ عَلَيْهِ فِيهِ اَلتَّقْصِيرُ وَ اَلْإِفْطَارُ قَالَ «لاَ بَأْسَ بِذَلِكَ.
Hadith.1298 - Ali ibn Yaqtin asked Abu al-Hasan (as) about a man who sets out on a journey and then decides to stay (reside) while he is in the midst of prayer.
Imam (as) said: "He should complete (the full prayer) when he decides to stay."
He also asked about a man who accompanies his brother to the point where shortening prayers and breaking the fast becomes obligatory.
Imam (as) said: "There is no harm in that."