Narrated from Al-Husayn ibn Sa'id, from Hammad ibn Isa, from Hariz, from Zurara: I asked Abu Ja'far عليه السلام: “If a man trims his nails, cuts his mustache, or takes something from the hair of his beard or head, does that invalidate his wudu (ablution)?” Imam عليه السلام replied: "O Zurara, all of this is Sunnah, and wudu is a religious obligation. Nothing from the Sunnah invalidates the obligation. In fact, doing these acts increases one in purity."