A Dominican missionary was stripped and forced to work as a camel driver

Evidence

It may be at this time of persecution that Riccoldo fled Baghdad only to be accosted by two Muslim Mongols who beat him, tried to make him convert to Islam, “to preach Muhammad and his perfidious law”; they stripped him of his Dominican habit and obliged him to make a living as a camel driver. — John V. Tolan, Saracens, 1237