The Angel Levine (1970)

Morris Mishkin is an elderly Jewish tailor plagued by hard times who prays to God for help and receives it in the person of a most unusual angel named Levine, a young, black, Jewish hustler from somewhere between Harlem and Heaven. The crux of the story centers on the angel, who has only 24 hours in which to convince Mishkin of his heavenly mission - while in the balance hang three lives. What is required is a mutual act of faith, from which will spring a common salvation. But alas, although Mishkin does come to believe in Levine, he does so in the 25th hour.