The Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, narrated to me from Ahmad ibn Muhammad, from his father, from Muhammad ibn Al-Hasan, from Ahmad ibn Muhammad, from Al-Husayn ibn Sa'id, from Hammad, from Hariz, from someone who informed him, from Abu Abdullah عليه السلام. He said: Imam عليه السلام said: "If a dog touches your clothing and it is dry, then sprinkle water on it. But if it is wet, then wash it."