The Chapter of the Qibla
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 43
وَ رَوَى زُرَارَةُ وَ مُحَمَّدُ بْنُ مُسْلِمٍ عَنْ أَبِي جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ أَنَّهُ قَالَ: «يُجْزِي اَلْمُتَحَيِّرَ أَبَداً أَيْنَمَا تَوَجَّهَ إِذَا لَمْ يَعْلَمْ أَيْنَ وَجْهُ اَلْقِبْلَةِ.
Zurarah and Muhammad ibn Muslim narrated from Imam Muhammad ibn Ali Al-Baqir عليه السلام that He said: "For one who is confused (about the direction of the Qiblah), it suffices for him to pray in whichever direction he faces if he does not know where the Qiblah is."
- Ṣaḥīḥ al-Faqīh, p. 42