Al-Kāfi
Hadith 14653ـ عَلِيٌّ عَنْ أَبِيهِ عَنْ حَمَّادٍ عَنْ حَرِيزٍ عَنْ زُرَارَةَ عَنْ أَحَدِهِمَا (عَلَيْهِما الْسَّلام) قَالَ إِذَا كُنْتَ خَلْفَ إِمَامٍ تَأْتَمُّ بِهِ فَأَنْصِتْ وَسَبِّحْ فِي نَفْسِكَ.
3. Ali has narrated from his father from Hammad from Hariz from Zurarah who has said the following: “One of the two Imam (a.s.), has said, ‘If you perform Salah (prayer) behind an Imam whom you follow then remain silent and say Tasbih (Allah is free of all defects) to yourself only.’”