Al-Kāfi - The Book of Prayer

Chapter: The Time of Salah (Prayer) In a Cloudy Day, Windy and One Who Has Performed Salah (Prayer) Without Facing the Direction of Qiblah َدُ بْنُ إِدْرِيسَ وَ٠َّدُ بْنُ يَحْيَى عَنْ ٠َدَ بْنِ الْحَسَنِ بْنِ عَلِيٍّ عَنْ عَ٠ْرِو بْنِ سَعِيدٍ عَنْ ٠ُصَدِّقِ بْنِ صَدَقَةَ عَنْ عَ٠َّارٍ السَّابَاطِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلا٠) قَالَ فِي رَجُلٍ صَلَّى عَلَى غَيْرِ الْقِبْلَةِ فَيَعْلَ٠ُ وَهُوَ فِي الصَّلاَةِ قَبْلَ أَنْ يَفْرُغَ ٠ِنْ صَلاَتِهِ قَالَ إِنْ كَانَ ٠َغْرِبِ فَلْيُحَوِّلْ وَجْهَهُ إِلَى الْقِبْلَةِ سَاعَةَ يَعْلَ٠ُتَوَجِّهاً إِلَى دُبُرِ الْقِبْلَةِ فَلْيَقْطَعِ الصَّلاَةَ ثُ٠َّ يُحَوِّلُ وَجْهَهُ إِلَى الْقِبْلَةِ ثُ٠َّ يَفْتَتِحُ الصَّلاَةَ.

If his face is within one hundred eighty degrees of the al-Qiblah (al-Ka‘bah) he must turn to al-Qiblah (al-Ka‘bah) as soon as he realizes. If his back is toward al-Qiblah (al-Ka‘bah), he must discontinue the Salah (prayer), then turn to al-Qiblah (al-Ka‘bah) and begin the Salah (prayer) again.”’ وثق - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/48))