(12) The Book of The At-Tatbiq (Clasping One's Hands Together)
كتاب التطبيق
(35) Chapter: How one should go down for prostration
(35) باب كَيْفَ يَخِرُّ لِلسُّجُودِ
Sunan an-Nasa'i 1084 
It was narrated that Abu Bushr said:
"I heard Yusuf-meaning Ibn Mahak- narrating that Hakim said: 'I gave my pledge of allegiance to the Messenger of Allah (ﷺ), pledging that I would go down (in prostration) only after standing up from bowing.'"
أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ، قَالَ حَدَّثَنَا خَالِدٌ، عَنْ شُعْبَةَ، عَنْ أَبِي بِشْرٍ، قَالَ سَمِعْتُ يُوسُفَ، - وَهُوَ ابْنُ مَاهِكٍ - يُحَدِّثُ عَنْ حَكِيمٍ، قَالَ بَايَعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم أَنْ لاَ أَخِرَّ إِلاَّ قَائِمًا ‏.‏
Grade :  Sahih (Darussalam)
Reference : Sunan an-Nasa'i 1084
In-book reference : Book 12, Hadith 56
English translation : Vol. 2, Book 12, Hadith 1085