Recommend me the scariest movie please

UPDATE WE FIGUED IT OUT We’re gonna be watching the hereditary even tho my cousin already watched it. Thanks everyone for the recommendations I’m gonna keep this post so next time I can come back to look at the recommendation. Hi guys me and my cousin are trying to watch a horror movie and most of them aren’t even scary they’re just boring so could you guys please recommend me a movie that will keep me up all night