Yarim bin As'ad said: I was with Sayyiduna Qays bin Sa'd (may Allah be pleased with him), who had served the Prophet (peace and blessings be upon him) for ten years. He performed ablution (wudu) and wiped over his leather socks, and I never forget the marks of his fingers on the socks, because they were new.
Hadith Referenceالمعجم الكبير للطبراني / باب القاف / 15973