It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that a man came to the Messenger of Allah (peace and blessings be upon him) and said: "O Messenger of Allah! My brother has a complaint in his stomach." He (peace and blessings be upon him) said: "Give him honey to drink." He came back and said: "I gave him honey to drink, but it has only increased his diarrhoea." The third or fourth time, the Messenger of Allah (peace and blessings be upon him) said: "Allah has spoken the truth, and your brother's stomach has lied." So he went and gave him honey to drink, and he recovered. This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs (Bukhari and Muslim) did not record it.