Sahih Muslim Book 030, Hadith Number 5660.
Hadith Section/Book: Sahih Muslim Sahih Muslim Book 30. The Excellent Qualities Of The Holy Prophet (PBUH) And His Companions
Chapter : The miracles of the Holy Prophet (may peace be upon him).
Jabir reported that Umm Malik used to send clarified butter in a small skin to the Apostle of Allah (may peace be upon him). Her sons would come to her and ask for seasoning when they had nothing with them (in the form of condiments) and she would go to that (skin) in which she offered (clarified butter) to Allah's Apostle (may peace be upon him), and she would find in that clarified butter and it kept providing her with seasoning for her household until she had (completely) squeezed it. She came to Allah's Apostle (may peace be upon him) and (informed him about it). Thereupon, he (the Holy Prophet) said: Did you squeeze it? She said: Yes. Thereupon he said: If you had left it in that very state, it would have kept on providing you (the clarified butter) on end.