Sahih Bukhari Volume 4, Book 61, Hadith 3622

حَدَّثَنَا أَبُو الْيَمَانِ، أَخْبَرَنَا شُعَيْبٌ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي حُسَيْنٍ، حَدَّثَنَا نَافِعُ بْنُ جُبَيْرٍ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ قَدِمَ مُسَيْلِمَةُ الْكَذَّابُ عَلَى عَهْدِ رَسُولِ اللَّهِ صلى الله عليه وسلم فَجَعَلَ يَقُولُ إِنْ جَعَلَ لِي مُحَمَّدٌ الأَمْرَ مِنْ بَعْدِهِ تَبِعْتُهُ‏.‏ وَقَدِمَهَا فِي بَشَرٍ كَثِيرٍ مِنْ قَوْمِهِ، فَأَقْبَلَ إِلَيْهِ رَسُولُ اللَّهِ صلى الله عليه وسلم وَمَعَهُ ثَابِتُ بْنُ قَيْسِ بْنِ شَمَّاسٍ، وَفِي يَدِ رَسُولِ اللَّهِ صلى الله عليه وسلم قِطْعَةُ جَرِيدٍ، حَتَّى وَقَفَ عَلَى مُسَيْلِمَةَ فِي أَصْحَابِهِ فَقَالَ ‏"‏ لَوْ سَأَلْتَنِي هَذِهِ الْقِطْعَةَ مَا أَعْطَيْتُكَهَا، وَلَنْ تَعْدُوَ أَمْرَ اللَّهِ فِيكَ، وَلَئِنْ أَدْبَرْتَ لَيَعْقِرَنَّكَ اللَّهُ، وَإِنِّي لأَرَاكَ الَّذِي أُرِيتُ فِيكَ مَا رَأَيْتُ ‏"

Narrated By Ibn Abbas : Musailama-al-Kadhdhab (i.e. the liar) came in the life-time of Allah's Apostle with many of his people (to Medina) and said, "If Muhammad makes me his successor, I will follow him." Allah's Apostle went up to him with Thabit bin Qais bin Shams; and Allah's Apostle was carrying a piece of a date-palm leaf in his hand. He stood before Musailama (and his companions) and said, "If you asked me even this piece (of a leaf), I would not give it to you. You cannot avoid the fate you are destined to, by Allah. If you reject Islam, Allah will destroy you. I think that you are most probably the same person whom I have seen in the dream."