And Muhammad ibn Hatim and Ibn Abi 'Umar narrated to us, both from Ibn 'Uyaynah—Ibn Hatim said: Sufyan ibn 'Uyaynah narrated to us—from 'Abdah and 'Asim ibn Abi al-Najud, who both heard Zirr ibn Hubaysh say: I asked Ubayy ibn Ka'b, may Allah be pleased with him, and said: "Indeed, your brother Ibn Mas'ud says: 'Whoever stands in prayer for the entire year will attain Laylat al-Qadr.'" He said: "May Allah have mercy on him. He intended that people should not become complacent. Indeed, he knew that it is in Ramadan, and that it is in the last ten nights, and that it is the twenty-seventh night." Then he swore without exception that it is the twenty-seventh night. I said: "On what basis do you say that, O Abu al-Mundhir?" He said: "By the sign, or the indication, that the Messenger of Allah, peace and blessings be upon him, informed us of—that on that day the sun rises with no rays."