(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." (FR)
Reference (FR): Sunan an-Nasa'i 1034 (FR)
In-book reference (FR): Book 12, Hadith 6 (FR)
English translation (FR): Vol. 2, Book 12, Hadith 1035 (FR)