Abu Hurairah (may Allah be pleased with him) narrates from the Prophet (peace be upon him) that he said: "When any one of you wakes up from his sleep, he should not put his hand into any vessel until he has washed it three times, for he does not know where his hand spent the night." The Imam says that Bishr bin Mu'adh narrated this hadith to us in a marfu' form and said, «‏‏‏‏من انائه» ‏‏‏‏ "from his vessel."