4:89
وَدُّوا۟ لَوْ تَكْفُرُونَ كَمَا كَفَرُوا۟ فَتَكُونُونَ سَوَآءًۭ ۖ فَلَا تَتَّخِذُوا۟ مِنْهُمْ أَوْلِيَآءَ حَتَّىٰ يُهَاجِرُوا۟ فِى سَبِيلِ ٱللَّهِ ۚ فَإِن تَوَلَّوْا۟ فَخُذُوهُمْ وَٱقْتُلُوهُمْ حَيْثُ وَجَدتُّمُوهُمْ ۖ وَلَا تَتَّخِذُوا۟ مِنْهُمْ وَلِيًّۭا وَلَا نَصِيرًا
They wish you would disbelieve as they disbelieved so you would be alike. So do not take from among them allies until they emigrate for the cause of Allah. But if they turn away, then seize them and kill them wherever you find them and take not from among them any ally or helper.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
Censuring the Companions for Disagreeing over the Hypocrites who Returned to Al-Madinah Before Uhud
Allah criticizes the believers for disagreeing over the hypocrites. There are conflicting opinions over the reason behind revealing this Ayah. Imam Ahmad recorded that Zayd bin Thabit said that Messenger of Allah ﷺ marched towards Uhud. However, some people who accompanied him went back to Al-Madinah, and the Companions of the Messenger of Allah ﷺ divided into two groups concerning them, one saying they should be killed and the other objecting. Allah sent down,
فَمَا لَكُمْ فِى الْمُنَـفِقِينَ فِئَتَيْنِ
(Then what is the matter with you that you are divided into two parties about the hypocrites) The Messenger of Allah ﷺ said,
«إِنَّهَا طَيْبَةُ، وَإِنَّهَا تَنْفِي الْخَبَثَ، كَمَا يَنْفِي الْكِيرُ خَبَثَ الْحَدِيد»
(She (Al-Madinah) is Taybah, and she expels filth, just as the billow expels rust from iron.) The Two Sahihs also recorded this Hadith. Al-`Awfi reported that Ibn `Abbas said that the Ayah was revealed about some people in Makkah who said they embraced Islam, yet they gave their support to the idolators. One time, theses people went out of Makkah to fulfill some needs and said to each other, "If we meet the Companions of Muhammad, there will be no harm for us from their side." When the believers got news that these people went out of Makkah, some of them said, "Let us march to these cowards and kill them, because they support your enemy against you." However, another group from the believers said, "Glory be to Allah! Do you kill a people who say as you have said, just because they did not perform Hijrah or leave their land Is it allowed to shed their blood and confiscate their money in this case" So they divided to two groups, while the Messenger ﷺ was with them, and did not prohibit either group from reiterating their argument. Thereafter, Allah revealed,