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 يَحْيَى عَنْ أَحْ٠َّادٍ عَنْ حَرِيزٍ عَنْ زُرَارَةَ قَالَ قَالَ أَبُو جَعْفَرٍ (عَلَيْهِ الْسَّلا٠) يُجْزِئُ التَّحَرِّي أَبَداً إِذَا لَ٠ْ أَيْنَ وَجْهُ الْقِبْلَةِ. 7.

Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Hammad from Flariz from Zurarah who has said the following: “Abu Ja‘far (a.s.), has said, ‘Al-Taharriy (investigation) is always sufficient in the issue of finding al-Qiblah (al-Ka‘bah).’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (15/48))