How he embraced Islam
The incident of his embracing Islam is that once he was going angrily with a bare sword in hand. On the way, he met Hadhrat Na‘eem Bin Abdullah (May Allah be well pleased with him). Hadhrat Umar (May Allah be well pleased with him) did not know that Hadhrat Na‘eem had embraced Islam. He asked him: O Umar! Where are you going with a bare sword in hand? He said: Today I want to settle the affair of the Founder of Islam. Hadhrat Na‘eem said: First look into your own house. Your sister Fatima Bint Khattab and brother-in-law Sa‘eed bin Zaid (May Allah be well pleased with them) have embraced Islam.
He changed his course and went to his sister’s house and knocked at the door. Both of them were reciting the Holy Quran. Immediately, they stopped the recitation and the sister answered the door. Hadhrat Umar (May Allah be well pleased with him) angrily said: Have you also become a Muslim? Then he turned to his brother-in-law and threw him to the ground. He then sat on his chest and started beating him. When the sister intervened, Hadhrat Umar (May Allah be well pleased with him) gave her such a slap that her face started bleeding. His sister said in a strong voice: Umar! No matter what you do, Islam cannot leave our hearts now. The face of the sister and her words which were full of faith moved Hadhrat Umar. He was silent for some time. Then he said: Whatever you were reading, show it to me. His sister said: You are impure. Unless you purify yourself with a complete bath, you cannot touch the blessed pages of the Holy Quran. Hadhrat Umar (May Allah be well pleased with him) immediately took a bath. When he took the pages of the Holy Quran, his eyes fell on a verse from Surah Taha. On reading this verse, his hair stood on end. At this time, the Holy Prophet (Sallallahu alaihi wa sallam) was in “Dar Arqam.” When Hadhrat Umar (May Allah be well pleased with him) reached there with a sword in hand, the door was closed. The Muslims had received the news as to why he was there and there was a delay in opening the door. Hadhrat Hamza (May Allah be well pleased with him) said: Open the door! If he has come with good intentions, he will be welcomed. If not, his head will be severed from his body with his own body.