Musaylimah al-Kadhdhab claimed prophethood, and the Messenger of Allah ﷺ had seen a vision concerning him and Al-Aswad al-Ansi, then it came true
Musaylimah al-Kadhdhab claimed prophethood in Dhu al-Hijjah of the 10th year, and the Messenger of Allah ﷺ had seen a vision concerning him and Al-Aswad al-Ansi, then it happened as he had seen it.

Musaylimah al-Kadhdhab claimed prophethood in Dhu al-Hijjah of the 10th year, and the Messenger of Allah ﷺ had seen a vision concerning him and Al-Aswad al-Ansi, then it happened as he had seen it.
It falls within the late Madinan period and the emergence of claimants to prophethood in the Arabian Peninsula
And in Dhu al-Hijjah of this year: Musaylimah al-Kadhdhab claimed prophethood, and the Messenger of Allah ﷺ saw a vision concerning him and Al-Aswad al-Ansi, and it came true.
The meaning is that a man among the Arabs claimed that he was a prophet, and that the Prophet ﷺ reported a vision he had seen about him and another man, Al-Aswad al-Ansi. Then the truth of that vision became clear later.
Musaylimah had been part of the delegation of Banu Hanifah, and the Prophet ﷺ sensed evil in him, then his claim to prophethood appeared later.
The appearance of reluctance, pride, and ambition for leadership in the reference passage
People became certain of the truth of what the Prophet ﷺ had said concerning Musaylimah and those with him in the vision.
Documents the ظهور of one of the most famous claimants to prophethood in the last years of the Prophet ﷺ's life
Shows the danger of lying about Allah and claiming what one does not have
It points to unrest in some parts of the peninsula with the appearance of a claimant to prophethood
Reveals how some people can be fooled by false claims
Teaches firmness in seeking the truth and leaving falsehood behind
Shows the effect of revelation (wahy) in exposing lies before they spread
Alerts us to the need to confront doctrinal deviation at its start
Claimed prophethood
Mentioned in the Prophet's ﷺ vision
Saw the vision that came true
The Prophet ﷺ's dream was true, and so was his prophethood
Condemning lying and false claims
The danger of a group following falsehood if it is not guided by the truth
A false claim can turn into a movement that affects society
Teaching the ummah that truth is not measured by the number of followers
Revelation is a source for distinguishing truth from falsehood
Unjustified claims to leadership or religious authority
Verify the sources of knowledge and leadership, and do not be fooled by claims
Be cautious of people who deviate in creed and thought
Confront false claims early
Do not follow everyone who claims a right for himself without proof
The event remains a historical event tied to its context and should not be equated with every modern dispute
Revelation was present then to uncover the truth, but today we rely on verification and sound Islamic knowledge
Every major claim needs sound proof before it is accepted