Narrated Abu Huraira
The Prophet (ﷺ) sent some cavalry towards Najd and they brought a man from the tribe of Banu Hanifa who was called Thumama bin Uthal. They fastened him to one of the pillars of the Mosque. The Prophet went to him and said, "What have you got, O Thumama?" He replied," I have got a good thought, O Muhammad! If you should kill me, you would kill a person who has already killed somebody, and if you should set me free, you would do a favor to one who is grateful, and if you want property, then ask me whatever wealth you want." He was left till the next day when the Prophet (ﷺ) said to him, "What have you got, Thumama? He said, "What I told you, i.e. if you set me free, you would do a favor to one who is grateful." The Prophet (ﷺ) left him till the day after, when he said, "What have you got, O Thumama?" He said, "I have got what I told you. "On that the Prophet (ﷺ) said, "Release Thumama." So he (i.e. Thumama) went to a garden of date-palm trees near to the Mosque, took a bath and then entered the Mosque and said, "I testify that None has the right to be worshipped except Allah, and also testify that Muhammad is His Apostle! By Allah, O Muhammad! There was no face on the surface of the earth most disliked by me than yours, but now your face has become the most beloved face to me. By Allah, there was no religion most disliked by me than yours, but now it is the most beloved religion to me. By Allah, there was no town most disliked by me than your town, but now it is the most beloved town to me. Your cavalry arrested me (at the time) when I was intending to perform the `Umra. And now what do you think?" The Prophet (ﷺ) gave him good tidings (congratulated him) and ordered him to perform the `Umra. So when he came to Mecca, someone said to him, "You have become a Sabian?" Thumama replied, "No! By Allah, I have embraced Islam with Muhammad, Apostle of Allah. No, by Allah! Not a single grain of wheat will come to you from Yamamah unless the Prophet gives his permission."
Narrated Ibn `Abbas
Musailima Al-Kadhdhab came during the lifetime of the Prophet (ﷺ) and started saying, "If Muhammad gives me the rule after him, I will follow him." And he came to Medina with a great number of the people of his tribe. Allah's Messenger (ﷺ) went to him in the company of Thabit bin Qais bin Shammas, and at that time, Allah's Messenger (ﷺ) had a stick of a date-palm tree in his hand. When he (i.e. the Prophet (ﷺ) ) stopped near Musailima while the latter was amidst his companions, he said to him, "If you ask me for this piece (of stick), I will not give it to you, and Allah's Order you cannot avoid, (but you will be destroyed), and if you turn your back from this religion, then Allah will destroy you. And I think you are the same person who was shown to me in my dream, and this is Thabit bin Qais who will answer your questions on my behalf." Then the Prophet (ﷺ) went away from him. I asked about the statement of Allah's Messenger (ﷺ) : "You seem to be the same person who was shown to me in my dream," and Abu Huraira informed me that Allah's Messenger (ﷺ) said, "When I was sleeping, I saw (in a dream) two bangles of gold on my hands and that worried me. And then I was inspired Divinely in the dream that I should blow on them, so I blew on them and both the bangles flew away. And I interpreted it that two liars (who would claim to be prophets) would appear after me. One of them has proved to be Al Ansi and the other, Musailima."
Narrated Abu Raja Al-Utaridi
We used to worship stones, and when we found a better stone than the first one, we would throw the first one and take the latter, but if we could not get a stone then we would collect some earth (i.e. soil) and then bring a sheep and milk that sheep over it, and perform the Tawaf around it. When the month of Rajab came, we used (to stop the military actions), calling this month the iron remover, for we used to remove and throw away the iron parts of every spear and arrow in the month of Rajab. Abu Raja' added: When the Prophet (ﷺ) sent with (Allah's) Message, I was a boy working as a shepherd of my family camels. When we heard the news about the appearance of the Prophet, we ran to the fire, i.e. to Musailima al-Kadhdhab.