A man came to the Messenger of Allah ﷺ and said, "Messenger of Allah, my brother has diarrhea."He said, "Give him honey to drink."The man went, then came back and said, "I gave it to him, but it only made him worse."He said, "Give him honey to drink."The man went, then came back and said, "I gave it to him, but it only made him worse."He said, "Give him honey to drink."The man went, then came back and said, "I gave it to him, but it only made him worse."On the fourth time he said to him, "Give him honey to drink." I think he said, so he gave it to him and he recovered.The Messenger of Allah ﷺ said on the fourth occasion, "Allah has spoken the truth, and your brother's belly has lied."
حدثنا يزيد أخبرنا شعبة عن قتادة عن أبي المتوكل الناجي
جاء رجل إلى رسول الله ﷺ فقال يا رسول الله إن أخي استطلق بطنه قال اسقه عسلا قال فذهب ثم جاء فقال قد سقيته فلم يزده إلا استطلاقا قال اسقه عسلا قال فذهب ثم جاء فقال قد سقيته فلم يزده إلا استطلاقا فقال اسقه عسلا قال فذهب ثم جاء فقال قد سقيته فلم يزده إلا استطلاقا فقال له في الرابعة اسقه عسلا قال أظنه قال فسقاه فبرأ فقال رسول الله ﷺ في الرابعة صدق الله وكذب بطن أخيك
Its isnad is sahih, and it appears in Bukhari 7/159, in the Book of Medicine, chapter on treatment with honey, and Muslim 4/1736, no. 2217, in the Book of Greetings, chapter on treatment with honey, and Tirmidhi 4/409, no. 2082, who said, hasan sahih.His saying "his stomach became loose" means he was afflicted with diarrhea, and the word "batn" (stomach) can be treated as either masculine or feminine.