‘Umair ibn ‘Adi Al-Khatmi’s mission to ‘Asmaa bint Marwan: she was one of the Banu Umayya ibn Zaid. When Abu ‘Afak [Jewish poet who opposed Muhammad (SAW)] was killed, she hid her true feelings. Abdullah ibn Al-Harith ibn Al-Fudail mentioned, from his father, who said: She was under [married to] one of the men from Banu Khatma called Yazid ibn Zaid. And she declaimed, disgracing Islam and its followers … And when news of this reached the Messenger of Allah (SAW), he said: Is there anyone who would get the daughter of Marwan for me? And ‘Umair ibn ‘Adi Al-Khatmi heard what the Messenger of Allah (SAW) said while he was with him. So when evening fell that night, he sneaked up on her in her house and killed her. Then he arose in the morning with the Messenger of Allah (SAW) and said: Oh Messenger of Allah, indeed I have killed her. He said: You have made Allah and His Messenger victorious, oh ‘Umair! Then he said: Am I accountable for anything regarding her, oh Messenger of Allah? And he said: Two goats would not even butt heads over her.
And ‘Umair went back to his people. The Banu Khatma were very shaken up that day about the matter of bint Marwan; at the time she had five sons. When ‘Umair ibn ‘Adi came to them after seeing the Messenger of Allah (SAW), he said: Oh Banu Khatma, I have killed bint Marwan, { so try to scheme against me, all of you, and do not let up } [Hud 55]. And that day was the first time that Islam became mighty in the house of the Banu Khatma; those who had previously yielded into Islam had hidden themselves because of their Islam. The first to yield into Islam among the Banu Khatma was ‘Umair ibn ‘Adi, who was called “the Reciter”, Abdullah ibn Aws, and Khuzaima ibn Thabit. On the day that the daughter of Marwan was killed, numerous men from Banu Khatma yielded into Islam, when they saw how mighty Islam was.