وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ
قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِذَا جِئْتُمْ إِلَى الصَّلَاةِ وَنَحْنُ سُجُودٌ فَاسْجُدُوا وَلَا تَعُدُّوهُ شَيْئًا وَمَنْ أَدْرَكَ رَكْعَةً فقد أدْرك الصَّلَاة»
Abu Hurayrah reported God’s Messenger as saying, “When you come to the prayer and we are prostrating ourselves you must prostrate yourselves without reckoning it as part of your prayer; and if anyone is present at a raka he has been present at the prayer.”
Mishkat al-Masabih 1082, Book 5, Prayer, Hadith 560. 1 min read