The conversion of U ' mar was a real triumph for the cause of Islam. So great and instant was the effect  of his conversion on the situation that the believers who had hitherto worshipped Allâh within their  four  walls in secret now assembled and performed their rites of worship openly in the Holy Sanctuary itself.
This raised their spirits, and dread and uneasiness began to seize Quraish.
Ibn Ishaq narrated on the authority of U ' mar (May Allah be pleased), "When I embraced Islam, I  remembered the archenemy of Muhammad (Peace be upon him), i.e. Abu Jahl. I set out, and knocked  at his door. When he came out to see me, I told him directly that I had embraced Islam. He  immediately slammed the door repulsively denouncing my move as infamous and my face as ugly." In  fact, U ' mar's conversion created a great deal of stir in Makkah that some people denounced him as an  apostate, yet he would never waver in Faith, on the contrary, he persisted in his stance even at the  peril of his life. The polytheists of Quraish marched towards his house with the intention of killing him.
A ' bdullah bin U ' mar (May Allah be pleased with him )  narrated: While U ' mar was at home in a state of  fear, there came Al-A ' s bin Wa'il As -Sahmy Abu A ' mr, wearing an embroidered cloak and a shirt  having  silk hems. He was from the tribe of Bani Sahm who were our allies during the pre-Islamic period of  ignorance. Al-A ' s said to U ' mar: Whats  ' wrong with you? He said: Your people claim that they will kill  me if I become a Muslim. Al-A ' s said: Nobody will harm you after I have given protection to you. So
Al-
A ' s went out and met the people streaming in the whole valley. He said: Where are you going? They  replied: We want son of Al-Khattab who has embraced Islam. Al-A ' s said: There is no way for anybody  to touch him. So the people retreated.
With respect to the Muslims in Makkah, U ' mar's conversion had a different tremendous impact.
Mujahid,  on the authority of Ibn Al-'Abbas (May Allah be pleased with him) related that he had asked U ' mar bin
Al-Khattab why he had been given the epithet of Al-Farouque (he who distinguishes truth from  falsehood), he replied: After I had embraced Islam, I asked the Prophet (Peace be upon him): A ' rent '  we on the right path here andHereafter? ' The Prophet (Peace be upon him) answered: O ' f course you  are! I swear by Allâh in Whose Hand my soul is, that you are right in this world and in the hereafter.'
I,  therefore, asked the Prophet (Peace be upon him) W ' hy we then had to conduct clandestine activism.
I  swear by Allâh Who has sent you with the Truth, that we will leave our concealment and proclaim our  noble cause publicly. ' We then went ou t in two groups, Hamzah leading one and I the other. We  headed  for the Mosque in broad daylight when the polytheists of Quraish saw us, their faces went pale and got  incredibly depressed and resentful. On that very occasion, the Prophet (Peace be upon him) attached  to  me the epithet of Al-Farouque. Ibn Mas'ud (May Allah be pleased with him) related that they (the
Muslims) had never been able to observe their religious rites inside the Holy Sanctuary except when
U ' mar embraced Islam.
Suhaib bin Sinan (May Allah be pleased with him), in the same context, said that it was only after
U ' mar's conversion, that we started to proclaim our Call, assemble around and circumambulat e the
Sacred House freely. We even dared retaliate against some of the injustices done to harm us. In the  same context, Ibn Mas'ud said: We have been strengthened a lot since U ' mar embraced Islam.
QURAISH'S REPRESENTATIVE NEGOTIATES WITH THE MESSENGER OF ALLAH: Shortly after  the  conversion of these two powerful heroes, Hamzah bin A ' bdul -Muttalib and U ' mar bin Al -Khattab (May
Allah be pleased with him), the clouds of tyranny and oppression started to clear away and the  polytheists realized that it was no use meting out torture to the Muslims. They consequently began to  direct their campaign to a different course. The authentic records of the biography of the Prophet
(Peace be upon him) show that it had occurred to the Makkan leaders to credit Muhammad (Peace be  upon him) with ambition. They, therefore, time and again plied him with temptation. One day some of  the important men of Makkah gathered in the enclosure of Al-Ka'bah, and U ' tbah bin Rabia, ' a chief  among them, offered to approach the Prophet (Peace be upon him) and contract a bargain with him  whereby they give him whatever worldly wealth he asks for, on condition that he keep silent and no  longer proclaim his new faith. The people of Quraish endorsed his proposal and requested him to  undertake that task. U ' tbah came closer to Muhammad (Peace be upon him) and addressed him in the  following words: