(119) باب إِذَا لَمْ يُتِمَّ الرُّكُوعَ
Narrated Zaid bin Wahb:
Hudhaifa saw a person who was not performing the bowing and prostration perfectly. He said to him, "You have not prayed and if you should die you would die on a religion other than that of Muhammad."
Reference: Sahih al-Bukhari 791
In-book reference: Book 10, Hadith 186
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 12, Hadith 757