He died in Shaʿbān of the third year.

Al-Thawrī relates—from ʿĀṣim ibn ʿUbayd Allāh (1), from al-Qāsim ibn Muḥammad, from ʿĀʾishah—that the Messenger of Allah ﷺ kissed ʿUthmān ibn Maẓʿūn when he had passed away, and his tears were flowing down the cheek of ʿUthmān ibn Maẓʿūn (2). Al-Tirmidhī declared the report sound.

Mālik transmits—from Abū al-Naḍr—who said: When the funeral of ʿUthmān ibn Maẓʿūn was carried by, the Messenger of Allah ﷺ said, “You have departed, taking nothing of this world with you” (3).

Ibrāhīm ibn Saʿd reports—from Ibn Shihāb, from Khārijah ibn Zayd, from Umm al-ʿAlāʾ—one of the women who had pledged allegiance—that ʿUthmān ibn Maẓʿūn fell ill while staying with them, so we nursed him until he died. The Messenger of Allah ﷺ then came, and I said, “My testimony concerning you, Abā al-Sāʾib: Allah has indeed honored you!” The Messenger of Allah replied, “And how do you know that?” I said, “I do not know—may my father and mother be your ransom, O Messenger of Allah—if not him, then who?” He said, “As for him, certainty has reached him, and by Allah I hope for good for him, yet I am the Messenger of Allah, and I do not know what will be done with me.” She said, “By Allah, I will never pronounce anyone pure after him.” She added, “That distressed me…"