Musannaf Ibn Abi Shaybah 553 — Those who held that ablution

Ibrahim bin Abdullah said: Once Sayyiduna Abu Hurayrah (may Allah be pleased with him) ate some pieces of dried curd (aqit), then performed ablution. After that he asked: "Do you know why I performed ablution? I ate pieces of dried curd (aqit). I heard the Messenger of Allah (peace and blessings be upon him) say: 'Perform ablution after eating whatever the fire has touched.'" The narrator said: Umar (bin Abd al-Aziz) used to perform ablution after eating sugar.