It is narrated from Hazrat Abdullah bin Hanzalah (may Allah be pleased with him) that a man greeted the Holy Prophet (peace and blessings be upon him), at that time the Holy Prophet (peace and blessings be upon him) had urinated, so he did not reply to him until he first struck his hand on the wall and performed tayammum (then he replied to him).
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 21959
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد ضعيف لإبهام الراوي عن عبدالله بن حنظلة