From Sahih Bukhari (Hadith 5716):
Narrated Abu Sa`id:A man came to the prophet and said, 'My brother has got loose motions. The Prophet (ﷺ) said, Let him drink honey." The man again (came) and said, 'I made him drink (honey) but that made him worse.' The Prophet (ﷺ) said, 'Allah has said the Truth, and the `Abdomen of your brother has told a lie." (See Hadith No)
Reference: Bukhari 5716