Al-Mughirah (may Allah be pleased with him) was with the Prophet (blessings and peace of Allah be upon him) during a journey on one of his campaigns, which was the campaign to Tabuk in 9 AH. The Prophet (blessings and peace of Allah be upon him) instructed him to pick up “the vessel” – the vessel in question was a small vessel that was used for carrying water for wudu’ and the like. So al-Mughirah (may Allah be pleased with him) picked it up, and the Prophet (blessings and peace of Allah be upon him) set out until he had moved away from al-Mughirah and disappeared from his sight. Then he relieved himself, urinating or defecating. He was wearing a jubbah that had been woven in Syria. The Prophet (blessings and peace of Allah be upon him) tried to bring his arm out of the sleeve, but he could not do that, because it was too narrow. So he brought his arm out from beneath the jubbah so that he would be able to wash it in wudu’, and he lifted the jubbah up onto his shoulders; the word translated here as shoulder refers to the point where the arm meets the shoulder. Al-Mughirah poured water for him, and he did wudu’ as prescribed for prayer, and wiped over his khuffs. The khuff is a kind of footwear made of leather, which covers the foot. It is usually worn for warmth. He wiped over his khuffs because he had put them on his feet when he was in a state of purity, so he availed himself of the concession allowing one to wipe over the khuffs without taking them off. Then the Prophet (blessings and peace of Allah be upon him) prayed. The Sunnah explains that wiping over the khuffs may be done for one day and night for one who is not travelling, and for three days and nights for one who is travelling. This hadith indicates that one may pray in clothes that were made by the polytheists, because there were Christians in Syria. It also indicates that it is valid to wipe over the khuffs..