Arwā bint Ḥarb (Arabic: أروى بنت حرب), better known as Umm Jamīl (Arabic: أم جميل), was an aunt-in-law of the Islamic prophet Muhammad who is mentioned in the Quran. She was Abu Lahab's wife and Abu Sufyan's sister. Arwa is usually remembered for opposing Islam and the prophet, and also for a poem.