Sayyidah Umm Ayman (may Allah be pleased with her) said: The Prophet (peace and blessings be upon him) urinated at night in an earthenware vessel kept in a corner of the house. I got up during the night, and I was thirsty, so I drank whatever was in it, not knowing what it was. When the Prophet (peace and blessings be upon him) rose in the morning, he said: "O Umm Ayman! Get up and pour out what is in that vessel." I said: By Allah, I have already drunk what was in it. The Messenger of Allah (peace and blessings be upon him) laughed so much that his (peace and blessings be upon him) molar teeth showed, then he said: "Listen, you will never again suffer from pain in your belly."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21692