In Damascus, as sermon giver (khatib) of the Umayyad mosque, he openly defied what he considered to be unsanctioned customs followed by the other sermon givers: he refused to wear black, refused to say his sermons in rhymed prose (saj) and refused to praise the princes. When the ruler As-Salih Ismail made capitulatory concessions to Theobald during the Barons' Crusade, Ibn 'Abd al-Salam condemned him from the pulpit and omitted mentioning him in the post-sermon prayer. He was consequently jailed and upon release emigrated to Egypt.