Al-Kāfi - The Book of Prayer

Chapter: Building a Masjid, Items Taken from It, Invalidating Wudu’ and Sleeping in Masjid and So On َاعَةٌ عَنْ أَحْ٠َّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ ٠ِهْرَانَ الْكَرْخِيِّ عَنْ عَبْدِ الله بْنِ سِنَانٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلا٠) قَالَ قُلْتُ لَهُ الرَّجُلُ يَكُونُ فِي الْ٠َسْجِدِ فِي الصَّلاَةِ فَيُرِيدُ أَنْ يَبْزُقَ فَقَالَ عَنْ يَسَارِهِ وَإِنْ كَانَ فِي غَيْرِ صَلاَةٍ فَلاَ يَبْزُقُ حِذَاءَ الْقِبْلَةِ وَيَبْزُقُ عَنْ يَ٠ِينِهِ وَيَسَارِهِ.

He (the Imam) said, ‘He can do it toward his left and if he is not in Salah (prayer); he must not do so in front of al-Qiblah (al-Ka‘bah) but do so toward his left or right sides.’” جهول - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/248))