أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا خَالِدٌ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ قَتَادَةَ، قَالَ سَمِعْتُ أَنَسًا، يُحَدِّثُ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " أَتِمُّوا الرُّكُوعَ وَالسُّجُودَ إِذَا رَكَعْتُمْ وَسَجَدْتُمْ " .
It was narrated that Qatadah said: "I heard Anas narrate that the Prophet (PBUH) said: "Bow and prostrate properly when you bow and prostrate.'" Translation Not Available
Book Ref: Sunan An Nisai Book 12 Hadith 1054
Web Ref: Sunan An Nisai Vol 2 Book 12 Hadith 1055