Hudhayfah said, "Hypocrisy existed only during the time of the Prophet ﷺ. As for today, it is simply disbelief after faith."
إنما كان النفاق على عهد النبي ﷺ، فأما اليوم فإنما هو الكفر بعد الإيمان.
Bukhari related it in "Kitab al-Fitan" (7114), from Khallad, who said, Masaar narrated to us, from Habib bin Abu Thabit, from Abu Shatha, from Huzaifa, who said, and then he mentioned it.