During this period, 'Umar Ibn Al-Khattab adopted Islam. In him the new faith gained a valuable adherent and an important factor in the future development and propagation of Islam.
Hitherto he had been a violent opposer of the Prophet and a bitter enemy of Islam. His conversion is said to have been worked by the miraculous effect on his mind of a surah of the Qur'an which his sister was reading in her house, where he had gone with the intention of killing her for adopting Islam. Thus the party of the Prophet had been strengthened by the conversion of his uncle Hamza, a man of great valor and merit; and of Abu Bakr and Umar, both men of great energy and reputation. The Muslims now ventured to perform their devotions in public.
Related Quran Ayaaths of this Hadith.
Surah 3 : Ayah 144Surah 2 : Ayah 4Surah 2 : Ayah 23Surah 2 : Ayah 80Surah 2 : Ayah 90Surah 2 : Ayah 93Surah 2 : Ayah 94Surah 2 : Ayah 97Surah 2 : Ayah 105Surah 2 : Ayah 108Surah 5 : Ayah 17Surah 5 : Ayah 48Surah 5 : Ayah 49Surah 3 : Ayah 12Surah 3 : Ayah 20Surah 3 : Ayah 31Surah 6 : Ayah 10Surah 6 : Ayah 11Surah 4 : Ayah 41"When a person dies, his works end, except for three: ongoing charity, knowledge that is benefited from, and a righteous child who prays for him."
Prophet Mohammed (PBUH)
"The best of what a man leaves behind are three: a righteous child who supplicates for him, ongoing charity the reward of which reaches him, and knowledge that is acted upon after him."
Sunan Ibn Mājah
"Every day two angels come down from Heaven and one of them says, 'O Allah! Compensate every person who spends in Your Cause,' and the other (angel) says, 'O Allah! Destroy every miser.'"
Sahih Bukhari