18. We were told by my father, may Allah grant him mercy, that he said: We were told by Muhammed bin Yahya al-‘Attar, from Muhammed bin Ahmad, from al-Saiyari, from Ibn Baqqah, from Abdul-Salam, that he ascribed it to Abu Abdillah, peace be upon him, that he said: It is disbelief in graces that a man says: «I ate such-and-such food, and it harmed me.»