The Sahabi who died while reading the Quran is Uthman ibn Affan, the third Caliph of Islam.
He was reading the Quran during the Fajr prayer when he was assassinated by a group of rebels.
This tragic event occurred in 656 CE in Medina, where he was stabbed multiple times while reciting the holy scripture.
Uthman's death marked a significant turning point in Islamic history, as it led to a period of civil war known as the First Fitna.
His martyrdom serves as a reminder of the importance of the Quran and the sacrifices made by those who dedicated their lives to its preservation and propagation.