Musannaf Ibn Abi Shaybah 37583 — The words of Rabi bin Khuthaym

It is narrated concerning al-Rabi' that he said to his family: Make a sweet pudding for me. So the pudding was cooked, and he then called a man who was insane. Al-Rabi' began feeding him morsels while his saliva was running. When he had eaten and left, the family said to al-Rabi': We went to trouble and prepared it, and then you fed it to a man who does not even know what he has eaten. Al-Rabi' said: But Allah knows.