The acceptance of Islam by Hazrat Umar (R.A.) had significant effect on the handful of Muslims of Makkah, who, till now, had to observe secrecy in the worship of Allah. Their spirt and courage had risen to such an extent that they risked going out of Dar-ul-Arqam to preach Islam.
The Quraish tried to bribe Rasulullah to forego Islam in exchange for gifts of wealth or any thing he would like. But they failed to persuade him to agree to anything that would be harmful to Islam. With Hazrat Umar (R.A.) and Hazrat Hamzah (R.A.) now fully united into the fold of Islam, the Quraish turned to torture and persecution of the lowest degree and of the most brutal kind.
Hazrat Bilal (R.A.), the slave of Umayya-bin-Khalaf, was laid flat on his back on hot sand. A hot heavy stone was placed on his chest and he was beaten while his hands were tied behind his back.
Hazrat Uthman (R.A.), a rich and prosperous man of the Banu Umayya tribe was tied up with ropes by his uncle and beaten and tortured.
Hazrat Zubayr-bin-Al Awwam (R.A.) was rolled in a mat and forced to inhale smoke until he suffocated. Hazrat Abuzar Ghiffary (R.A.) belonged to the Ghaffar tribe of Madinah. On hearing of Rasulullah , he travelled all the way from Madinah to meet Rasulullah . On their first meeting, Hazrat Abuzar (R.A.) accepted Islam and with the joy of Islam in his heart, he went to the Ka'bah and recited the Kalimah and an Aayat of the Quraan in a loud, clear voice. The Quraish who were present at the Ka'bah, immediately set upon him and beat him unconscious. Hazrat Abbas (R.A.) who was not a muslim as yet, recognised Hazrat Abuzar (R.A.) from whose tribe the Quraish bought dates and Hazrat Abbas (R.A.) stopped the Quraish from assaulting him further. This saved Hazrat Abuzar (R.A.)'s life and he returned to Madinah a more determined Muslim inspite of the torture inflicted upon him.
Hazrat Ammar (R.A.), his father Hazrat Yaasir (R.A.) and his mother Sumayyah (R.A.) had embraced Islam. Abu Jahl killed Hazrat Sumayya (R.A.) with a sharp spear in such a shameful manner that there is on parallel of such torture in history.
Abu Jahl also took beastly delight in beating slave lady, Hazrat Zaeerah (R.A.) in such a way that she became totally blind.
Some helpless Muslims like Hazrat Khabbab-bin-Aett (R.A.) were secured and pushed into a flaming fire.