Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Indeed, among the natural practices of Islam are taking a bath on Friday, using the miswak, keeping the moustache short, and letting the beard grow, because the Magians grow their moustaches and trim their beards, so you should oppose them; keep your moustaches short and let your beards grow."