Hadith
Bulugh al-Maram #609
The Book of Prayer· كتاب الصلاة
bulugh_al_maram:609وَفِي رِوَايَةٍ لَهُ: فَبَعَثَ مُنَادِيًا يُنَادِي: اَلصَّلَاةُ جَامِعَةٌ 1 .1 - مسلم برقم (901) (4).
"He (ﷺ) sent an announcer to announce: The prayer is (to be offered) in congregation".
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