Musnad Ahmad 31:159

Hassan narrated to us, he said: Shayban narrated to us, from Qatadah, and he narrated from Abu al-Siddiq, from Abu Sa’id al-Khudri, that a man came to the Prophet, peace and blessings of Allah be upon him, and said: "My brother’s son has a loose stomach." He said: "Give your brother’s son honey to drink." He said: So he gave him to drink, but it only increased his severity. He returned to the Prophet, peace and blessings of Allah be upon him, three times. The Prophet, peace and blessings of Allah be upon him, said to him on the third time: "Give your brother’s son honey to drink, for Allah, the Mighty and Majestic, has spoken the truth, and your brother’s son’s stomach has lied." He said: So he gave him to drink, and Allah, the Mighty and Majestic, cured him.