It is narrated from Ibn Sa'd bin Mu'adh that the Messenger of Allah (peace and blessings be upon him) addressed the people and said: Who will save me from those who cause me harm and give shelter in their homes to those who trouble me? So our master Sa'd bin Mu'adh (may Allah be pleased with him) said: If that person is from Aws, we will kill him, and if he is from our brothers, the Khazraj, then you command us, we will obey you. Upon this, our master Sa'd bin 'Ubadah (may Allah be pleased with him) stood up and said: O Ibn Mu'adh! What is the matter with you? The obedience to the Messenger of Allah (peace and blessings be upon him) is in its place, but you have said something that does not befit you. Then our master Usayd bin Hudayr (may Allah be pleased with him) stood up and said: O Ibn 'Ubadah! You are a hypocrite and you love the hypocrites. At this, our master Muhammad bin Maslamah (may Allah be pleased with him) stood up and said: O people! Be silent, indeed the Messenger of Allah (peace and blessings be upon him) is among us, whatever he commands us, we will carry it out. Then Allah the Exalted revealed this verse: ﴿فَمَا لَكُمْ فِي الْمُنَافِقِينَ فِئَتَيْنِ وَاللَّهُ أَرْكَسَهُمْ بِمَا كَسَبُوا﴾.