From Sahih Muslim (Hadith 5770):
Abu Sa'id Khudri reported that a person came to Allah's Apostle (ﷺ) and told him that his brother's bowels were loose. Thereupon Allah's Messenger (ﷺ) said:Give him honey. So he gave him that and then came and said: I gave him honey but it has only made his bowels more loose. He said this three times; and then he came the fourth time, and he (the Holy Prophet) said: Give him honey. He said: I did give him, but it has only made his bowels more loose, whereupon Allah's Messenger (ﷺ) said: Allah has spoken the truth and your brother's bowels are in the wrong. So he made him drink (honey) and he was recovered
Reference: Muslim 5770