(17) باب الْخَصْرِ فِي الصَّلاَةِ
Narrated Abu Huraira:
It was forbidden to pray with the hands over one's hips. (ID)
Reference (ID): Sahih al-Bukhari 1220 (ID)
In-book reference (ID): Book 21, Hadith 24 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 22, Hadith 311 (ID)