Abu Dhar al-Ghifari

Abu Dhar al-Ghifari (580-653 CE), born Jundub ibn Junadah, was one of the earliest converts to Islam and one of the most outspoken advocates for social justice among the companions. A member of the Ghifar tribe, which was known for highway robbery, Abu Dhar heard about the Prophet's message and traveled to Mecca to investigate. After meeting Muhammad and hearing the Quran, he immediately embraced Islam. He then publicly declared his faith at the Kabah and was beaten by the Quraysh until Abbas ibn Abdul-Muttalib intervened.

The Prophet described Abu Dhar as the most truthful in speech among the companions and compared his ascetic devotion to that of Isa ibn Maryam (Jesus). Abu Dhar lived a life of extreme simplicity and refused to accumulate wealth, believing that excess possessions beyond one's basic needs should be given to the poor. He was fearless in speaking truth to power, and after the Prophet's death, he became a vocal critic of what he perceived as the growing materialism among some Muslims.

During the caliphate of Uthman, Abu Dhar's outspoken criticism of wealth accumulation led to his voluntary exile to ar-Rabadhah, a remote settlement near Medina, where he lived in austere simplicity until his death in 32 AH (653 CE). He died with only his wife and daughter present, having predicted that a small group of travelers would find and bury him. His legacy as a champion of the poor and a voice of prophetic social conscience remains influential in Islamic thought.