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