The verses recited before Hazrat Umar (R.A) were from Surah Taha or Surah Al-Hadid. After this, Hazrat Umar (R.A) rushed directly to the Holy Prophet (PBUH) with the same sword he had intended to kill him with. However, instead, he accepted Islam.
Umar ibn al-Khaṭtāb, (born c. 586, Mecca, Arabia died November 3, 644, Medina, Arabia), the second Muslim caliph (from 634), under whom Arab armies conquered Mesopotamia and Syria and began the conquest of Iran and Egypt.
The caliph was assassinated on 27th Zilhaj, 644 by a Magian while he was leading the prayer, stabbing him six times in the belly that proved fatal. The great caliph of Islam embraced martyrdom on 1st Moharram.
Hazrat Umar (RA) conquered 2,200,000 square miles of territory within the same period.
Hazrat 'Umar was the first person to suggest the calling of the Azan. Later, through a revelation, Allah gave permission to the Prophet (PBUH) to call out the Azan.
