كتاب الصلاة
2  
The Book of Prayer
In another narration of Muslim:
"He (ﷺ) sent an announcer to announce: The prayer is (to be offered) in congregation".
وَفِي رِوَايَةٍ لَهُ: فَبَعَثَ مُنَادِيًا يُنَادِي: اَلصَّلَاةُ جَامِعَةٌ 1‏ .‏


‏1 ‏- مسلم برقم (901)‏ (4)‏.‏

Sunnah.com reference : Book 2, Hadith 434
English translation : Book 2, Hadith 0
Arabic reference : Book 2, Hadith 504