Musannaf Ibn Abi Shaybah 37209 — The words of Umar bin al-Khattab

Zayd bin Aslam narrates from his father that he said: I would bring a sa' of dates to Sayyiduna Umar (may Allah be pleased with him), and Sayyiduna Umar (may Allah be pleased with him) would say: "O Aslam! Remove its skins for me." Then he would eat the poor-quality dates.