Muwatta Malik #188
Prayer
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، أَنَّهُ كَانَ يَقْرَأُ خَلْفَ الإِمَامِ فِيمَا لاَ يَجْهَرُ فِيهِ الإِمَامُ بِالْقِرَاءَةِ .
Yahya related to me from Malik from Hisham ibn Urwa that his
father used to recite behind the imam when the imam did not recite
aloud.
About Muwatta Malik
This hadith is #188 from Muwatta Malik, in the Book of Prayer.