The Messenger of Allah ﷺ prohibited to sit on hips by erecting feet, sticking them to the stomach and holding them with hands on Friday while the imam is delivering the sermon.
أَنَّ رَسُولَ اللَّهِ ﷺ نَهَى عَنِ الْحُبْوَةِ يَوْمَ الْجُمُعَةِ وَالإِمَامُ يَخْطُبُ