(2) باب الإِمْسَاكِ بِالرُّكَبِ فِي الرُّكُوعِ
It was narrated that 'Abdur-Rahman As-Sulami said:
" 'Umar said: 'The Sunnah is to hold the knees.'" (DE)
Reference (DE): Sunan an-Nasa'i 1035 (DE)
In-book reference (DE): Book 12, Hadith 7 (DE)
English translation (DE): Vol. 2, Book 12, Hadith 1036 (DE)