From Sahih Muslim (Hadith 6740):
Abu Huraira reported Allah's Messenger (ﷺ) as saying:Verily, a man would perform the deeds of the people of Paradise for a long time, then his deeds would be concluded with the deeds of the people of Hell. And verily, a man would perform the deeds of the people of Hell for a long time, and then his deeds would be concluded with the deeds of the people of Paradise
Reference: Muslim 6740