Muwatta Malik #660

Yahya related to me from Malik from Abdullah ibn Abd ar-Rahman ibn Mamar al-Ansari from Abu Yunus, the mawla of A'isha, from A'isha that she overheard a man standing at the door saying to the Messenger of Allah, may Allah bless him and grant him peace, "Messenger of Allah, I get up in the morning junub, in a state of major ritual impurity, and want to fast," and the Messenger of Allah, may Allah bless him and grant him peace, said, "I too get up in the morning junub and want to fast, so I do ghusl and fast." The man said to him, "You are not the same as us. Allah has forgiven you all your wrong actions that have gone before and those that have come after." The Messenger of Allah, may Allah bless him and grant him peace, got angry and said, "By Allah, I hope that I am the most fearful of you with respect to Allah and the most knowledgeable of you in how I have taqwa."