The Prophet (ﷺ) said, "When Khosrau perishes, there will be no more Khosrau a after him, and when Caesar perishes, there will be no more Caesar after him," The Prophet (ﷺ) also said, "You will spend the treasures of both of them in Allah's Cause."
Sahih al-Bukhari Book 61, Hadith 126
← Previous Hadith Allah's Messenger (ﷺ) said, "When Khosrau perishes, there will be no (more) Khosrau after him, and when Caesar perishes, there will be no more Caesar after him. By Him in Whose Hands Muhammad's life is, you will spend the treasures of both of them in Allah's Cause."

Sahih al-Bukhari Book 61, Hadith 125 Next Hadith → Musailama-al-Kadhdhab (i.e. the liar) came in the life-time of Allah's Messenger (ﷺ) with many of his people (to Medina) and said, "If Muhammad makes me his successor, I will follow him." Allah's Messenger (ﷺ) went up to him with Thabit bin Qais bin Shams; and Allah's Messenger (ﷺ) was carrying a piece of a datepalm 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." Abu Huraira told me that Allah's Messenger (ﷺ); said, "While I was sleeping, I saw (in a dream) two gold bracelets round my arm, and that worried me too much. Then I was instructed divinely in my dream, to blow them off and so I blew them off, and they flew away. I interpreted the two bracelets as symbols of two liars who would appear after me. And so one of them was Al-Ansi and the other was Musailama Al-Kadhdhab from Al-Yamama."

Sahih al-Bukhari Book 61, Hadith 127