Ibn Mu'iz Sa'di, may Allah have mercy on him, says that once I went out in the morning to give water to my horse, and as I passed by the mosque of Banu Hanifa, I heard those people saying that Musaylimah is the messenger of Allah. I went to Sayyiduna Ibn Mas'ud, may Allah be pleased with him, and mentioned this to him. He sent soldiers to bring them, made them repent, and they repented. Sayyiduna Ibn Mas'ud, may Allah be pleased with him, let them go, but he beheaded Abdullah bin Nuwahah. People asked him, "You apprehended a group of people for the same matter, but killed some and let others go. What is the reason for this?" He replied, "This man and Ibn Athal had come to the Prophet ( صلی اللہ علیہ وسلم ) as envoys from Musaylimah the Liar. The Prophet ( صلی اللہ علیہ وسلم ) asked both of them: 'Do you testify that I am the Messenger of Allah?' They said, 'We testify that Musaylimah is the messenger of Allah.' The Prophet ( صلی اللہ علیہ وسلم ) said: 'If I were to kill envoys, I would have beheaded both of you.' For this reason, I have killed him."