Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates: "A man passed by the Messenger of Allah (peace and blessings be upon him) while he (peace and blessings be upon him) was urinating, and he greeted him (peace and blessings be upon him) with salam, but he (peace and blessings be upon him) did not reply to him. Then when he (peace and blessings be upon him) had finished, he struck his two palms (on the ground) and performed dry ablution (tayammum), and then returned his greeting."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Imam al-Awza'i (may Allah have mercy on him) except Maslamah bin Ali, and Hisham bin Ammar is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب السين / 3641
Hadith Gradingمحدثین:إسناده ضعيف، فيه مسلمة بن علي وعامة أحاديثه غير محفوظة
Hadith Takhrij«قال ابن عدي: أحاديث مسلمة بن علي كلها أو عامتها غير محفوظة «الكامل في الضعفاء، ج 8، ص 21»» «أخرجه ابن ماجه فى «سننه» برقم: 351»