(2) باب الإِمْسَاكِ بِالرُّكَبِ فِي الرُّكُوعِ
It was narrated that 'Umar said:
"It is established for you to hold the knees, so hold the knees." (DE)
Reference (DE): Sunan an-Nasa'i 1034 (DE)
In-book reference (DE): Book 12, Hadith 6 (DE)
English translation (DE): Vol. 2, Book 12, Hadith 1035 (DE)