Hudhayfah ibn al-Yaman

Hudhayfah ibn al-Yaman (d. 36 AH / 656 CE), whose full name is Hudhayfah ibn Husayl ibn Jabir al-Absi al-Yamani, was a companion of unique standing, known above all as the keeper of the Prophet's secret regarding the hypocrites (munafiqin) of Medina. His father al-Yaman was himself a companion who was accidentally killed by the Muslim forces at the Battle of Uhud, and Hudhayfah bore this tragic loss with patience. His kunya was Abu Abdillah.

The Prophet Muhammad ﷺ confided to Hudhayfah alone the names of the hypocrites who were outwardly Muslim but inwardly opposed to Islam. Hudhayfah kept this trust with absolute fidelity, never revealing the names he had been given. This created a practical system of verification: Umar ibn al-Khattab would carefully observe whether Hudhayfah offered the funeral prayer for a deceased man; if Hudhayfah refrained, Umar would not pray over the body either, knowing that the man was among the hypocrites. This indirect use of Hudhayfah's secret knowledge helped protect the Muslim community.

Hudhayfah's knowledge of the hypocrites extended to a broader knowledge of the trials (fitan) that would face the Muslim ummah after the Prophet's death. The Prophet ﷺ taught him extensively about future tribulations, and Hudhayfah transmitted many of the most important hadith in this category. His narrations about fitan, preserved in the major collections, became central texts for Islamic eschatology and for understanding how Muslims should navigate periods of religious and political turmoil. He famously advised: "Ask about evil so that you can protect yourself from it."

At the Battle of al-Khandaq (The Trench), the Prophet sent Hudhayfah on a dangerous solo mission into the enemy camp at night to gather intelligence, a mission that required extraordinary courage and self-control. He served as governor of al-Madain (the former Sasanian capital Ctesiphon) under Umar and Uthman. He was the one who alerted Uthman to the alarming differences in Quranic recitation across the empire, directly prompting the standardization of the Quran. He died in al-Madain shortly after the assassination of Uthman in 36 AH.