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