مشكوة المصابيح
Mishkat al-Masabih
كتاب الصلاة
The Book of Prayer
(إِذَا وَافَقَتْ رَكْعَةٌ مَعَ الْإِمَامِ فَقَدْ وَافَقَ الْجَمَاعَةَ)
(If one rak‘ah matches with the Imam, it counts as joining the congregation)
Hadith 1412
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: مَنْ أَدْرَكَ رَكْعَةً مِنَ الصَّلَاةِ مَعَ الإِمَام فقد أدْرك الصَّلَاة كلهَا
Abu Huraira reported God’s Messenger as saying, “If anyone is in time for a rak‘a in the prayer along with the imam he has said the whole prayer.” (Bukhari and Muslim.)
