Hudhayfah ibn al-Yaman

Hudhayfah ibn al-Yaman (Arabic: حُذَيْفَةَ بْنَ الْيَمَانِ, romanized: Ḥudhayfah ibn al-Yamān; died 656) was a prominent companion (Sahabah) of the Islamic prophet Muhammad and a central military and political figure in the early Rashidun Caliphate. He is widely celebrated in Islamic tradition as the "Keeper of the Secret" (Sahib al-Sirr), a title earned after Muhammad entrusted him with the identities of the hypocrites (Munafiq) in Medina. Hudhayfah was tasked with monitoring the activities of these individuals, who posed a significant internal threat to the community. He remained faithful to his pledge of secrecy throughout his life.

Hudhayfah distinguished himself as an intelligence officer at the Battle of the Trench and later as a general during the Muslim conquest of Persia, most notably taking command at the Battle of Nahavand (642). He served as the governor of Kufa and Al-Mada'in, where he was recognized for his ascetic leadership. Beyond his military role, Hudhayfah was a catalyst for the standardization of the Quran after reporting regional variations in recitation to Caliph Uthman. He died in 656, shortly after the Assassination of Uthman, leaving a significant legacy in Hadith scholarship regarding internal faith and political strife.