صحيح مسلم
Sahih Muslim
كتاب المساجد ومواضع الصلاة
The Book of Mosques and Places of Prayer
باب مَنْ أَدْرَكَ رَكْعَةً مِنَ الصَّلاَةِ فَقَدْ أَدْرَكَ تِلْكَ الصَّلاَةَ:
Chapter: The one who catches up with a rak`ah of the prayer, he has caught up with that prayer
Hadith 609
This hadith is listed as number 1378 in Maktaba Shamila
وحَدَّثَنَاه عَبْدُ الأَعْلَى بْنُ حَمَّادٍ ، حَدَّثَنَا مُعْتَمِرٌ ، قَالَ : سَمِعْتُ مَعْمَرًا بِهَذَا الإِسْنَادِ .
This hadith has been reported by Ma'mar with another chain of transmitters.
