Silsilat al-Ahadith al-Sahihah

Sayyiduna Zayd bin Thabit (may Allah be pleased with him) said regarding this verse «فَمَا لَكُمْ فِي الْمُنَافِقِينَ فِئَتَيْنِ» "What is [the matter] with you [that you are] two groups concerning the hypocrites?" (4-An-Nisa:88): When the Companions returned from the Battle of Uhud, they were divided into two groups regarding the hypocrites. One group thought that they should be killed, and the other thought that they should not be killed. Regarding these people, this verse was revealed: «فَمَا لَكُمْ فِي الْمُنَافِقِينَ فِئَتَيْنِ» "What is [the matter] with you [that you are] two groups concerning the hypocrites?" At that time, the Prophet (peace and blessings be upon him) said, "This (i.e., Madinah) is Tayyibah; it expels impurity just as fire removes the impurities of iron."