Musnad Ahmad 33:623

Musa narrated to us, Ibn Lahi'ah narrated to us, from Abu al-Zubayr, from Jabir, from al-Bahziyyah, Umm Malik: She used to gift clarified butter to the Prophet, peace and blessings of Allah be upon him, in a skin container of hers. While her sons were asking her for a condiment, and she had nothing, she went to the skin container in which she used to gift the clarified butter to the Prophet, peace and blessings of Allah be upon him, and she found clarified butter in it. It continued to provide a condiment for her sons until she squeezed it. She came to the Prophet, peace and blessings of Allah be upon him, and he said, "Did you squeeze it?" She said, "Yes." He said, "If you had left it, it would have continued to remain."