عن معاذ بن أنس الجهني، رضي الله عنه
أن النبي صلى الله عليه وسلم نهى عن الحبوة يوم الجمعة والإمام يخطب
The Prophet (sallallahu alayhi wa sallam) forbade (us) from sitting with our legs drawn up to our belly (Ihtiba) during the Friday Khutbah (religious talk before the prayer).
Riyad as-Salihin 1705, Book 18, The Book of the Prohibited actions, Hadith 195. 1 min read