(24) باب الأَمْرِ بِتَحْسِينِ الصَّلاَةِ وَإِتْمَامِهَا وَالْخُشُوعِ فِيهَا
Anas b. Malik reported. The Messenger of Allah (ﷺ) said:
Perform bowing and prostration well. By Allah, I see you even if you are behind me, or he said: (I see you) behind my back when you bow or prostrate. (ID)
Reference (ID): Sahih Muslim 425 a (ID)
In-book reference (ID): Book 4, Hadith 121 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 855 (ID)