From Sahih Bukhari (Hadith 6990):
Narrated Abu Huraira:I heard Allah's Messenger (ﷺ) saying, "Nothing is left of the prophetism except Al-Mubashshirat." They asked, "What are Al-Mubashshirat?" He replied, "The true good dreams (that conveys glad tidings)
Reference: Bukhari 6990