(17) باب التَّغْلِيظِ فِي التَّخَلُّفِ عَنِ الْجَمَاعَةِ
It was narrated from Ibn 'Abbas that:
The Prophet said: "Whoever hears the call and does not come, his prayer is not valid, except for those who have an excuse."
Reference: Sunan Ibn Majah 793
In-book reference: Book 4, Hadith 59
English translation: Vol. 1, Book 4, Hadith 793