Sahih al-Bukhari
Book 10: Call to Prayers (Adhaan)
كتاب الأذان
266 hadith in this book
Chapter 119 Not performing bowing perfectly
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."
حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ سُلَيْمَانَ، قَالَ سَمِعْتُ زَيْدَ بْنَ وَهْبٍ، قَالَ رَأَى حُذَيْفَةُ رَجُلاً لاَ يُتِمُّ الرُّكُوعَ وَالسُّجُودَ قَالَ مَا صَلَّيْتَ، وَلَوْ مُتَّ مُتَّ عَلَى غَيْرِ الْفِطْرَةِ الَّتِي فَطَرَ اللَّهُ مُحَمَّدًا صلى الله عليه وسلم.
Hadith text, translations and grading are courtesy of Sunnah.com.