The Messenger of Allah ﷺ said, "The Hour will not come until nearly thirty lying impostors arise, each one claiming to be a messenger of Allah."
حدثنا محمود بن غيلان حدثنا عبد الرزاق أخبرنا معمر عن همام بن منبه
قال رسول الله ﷺ لا تقوم الساعة حتى ينبعث دجالون كذابون قريب من ثلاثين كلهم يزعم أنه رسول الله
Bukhari also reported it in the Book of Virtues, chapter on the signs of prophethood in Islam, no. 3609, from the hadith of Abdul-Razzaq, with the same chain.On this subject there are also narrations from Jabir bin Samura [Muslim, no. 2923] and Ibn Umar [Ahmad, 2/104].