Imam al-Bazzar recorded
this narration on the authority of Sayyiduna Ammar (may Allah be pleased with him); he narrates: The Prophet (peace and blessings be upon him) saw me while I was at a well, drawing water with a bucket into my vessel. The Prophet (peace and blessings be upon him) said: What are you doing? I said: O Messenger of Allah! I am washing my garment, which had janabah (sexual impurity) on it. The Prophet (peace and blessings be upon him) said: O Ammar! A garment is washed only because of excrement, urine, vomit or blood. The chains of all these narrations revolve around a narrator named Thabit bin Hammad, and he is extremely da'if (weak); and Allah knows best.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الطهارة / 1565