In 1197, in a battle in Normandy, Pierre de Dreux, bishop of Beauvais and cousin-german to the king of France, was taken in arms by Richard I of England. Richard hated that martial prelate, and loaded him with irons. The bishop applied to the pope for redress, and the pope wrote to Richard a gentle remonstrating letter in favour of the prelate.
Richard answered by sending the bishop's coat of mail, which was besmeared with blood, to Rome, with these words from the Holy Bible: "Know now whether it be thy son's coat or not."* This answer put a stop to the pope's intercession, and he replied that the coat did not belong to a son of the church, but to a son of the camp. The prelate, thus abandoned, had to purchase his liberty at the price of 10,000 marks.
皮埃爾．戴德勒和法國國王是表兄弟，也是博韋主教，一一九七年，在諾曼第一場戰役之中，全身披掛，為英格蘭王理查一世所擒。理查痛恨這個戰鬥教士，給他戴上手銬腳鐐。戴德勒要求教皇相助，教皇就致函理查，婉言相規，為戴德勒說項。
理查的回答，是把戴德勒染血的鎧甲送到羅馬，並附錄《聖經》一句話：「請看這是不是你孩子的衣服。」教皇於是不再為戴德勒說情，覆信說，穿衣者不是教會的孩子，而是軍營的孩子。戴德勒失助，唯有以一萬馬克贖身。
*語出《聖經．創世紀》第三十七章三十二節。