Ibn ʿAbbās also related from him the story of Moses and al-Khiḍr, and this too is recorded in the two Ṣaḥīḥs.⦗1⦘
In the Six Books there are slightly more than sixty hadiths transmitted on the authority of Ubayy.
The ḥadith master Abū Muḥammad al-Nūnī informed me of his lineage and said:
“Mālik ibn al-Najjār was the brother of ʿAdī, Dīnār, and Māzin. Their father al-Najjār was named Taymullāh ibn Thaʿlabah ibn ʿAmr ibn al-Khazraj.⦗2⦘ Ubayy ibn Kaʿb was a cousin of Abū Ṭalḥah al-Anṣārī.”
Ubayy was slender, short, and his hair and beard were white.
Al-Wāqidī said: “I heard his household and others besides them say that he died in 22 AH in Madinah. I have also heard it said that he died during the caliphate of ʿUthmān, in 30 AH, and this, in our view, is the more reliable report, because ʿUthmān had commissioned him to compile the Qurʾān.
Hammād ibn Zayd narrated—from Ayyūb and Hishām—from Ibn Sīrīn—that ʿUthmān gathered twelve men from Quraysh and the Anṣār, among them Ubayy and Zayd ibn Thābit, to compile the Qurʾān.⦗3⦘
According to Baqī ibn Makhlad, he has 164 hadiths; of these, three are found in both al-Bukhārī and Muslim. Al-Bukhārī alone records three others, while Muslim records seven exclusively.