Hazrat Abdur Rahman bin Auf (may Allah be pleased with him) once asked Hazrat Bilal (may Allah be pleased with him) how the Prophet Muhammad (peace and blessings be upon him) used to perform masah (wiping) over the leather socks. He replied that the Prophet Muhammad (peace and blessings be upon him) would come out, have a vessel of water brought to him, and wash his blessed face and both blessed hands, then he would perform masah over the leather socks and the turban.