(122) باب وَضْعِ الْيُمْنَى عَلَى الْيُسْرَى فِي الصَّلاَةِ
Narrated AbuHurayrah:
(The established way of folding hands is) to hold the hands by the hands in prayer below the navel.Abu Dawud said: I heard Ahmad b. Hanbal say: The narrator 'Abd al-Rahman b. Ishaq al-Kufi is weak (i.e. not reliable).
Reference: Sunan Abi Dawud 758
In-book reference: Book 2, Hadith 368
English translation: Book 3, Hadith 757