Rabbi Ozer is a character in the story, The Gentleman from Cracow. He cautions his congregation about accepting gifts from The Gentleman from Cracow, believing there's something suspicious going on. He then issues an edict preventing the young women of Frampol from being paraded like prostitutes, as demanded by the doctor from Cracow, who is dlater revealed to be Satan. When Satan us successfully driven out of town, he is memorialized by a statue in the holy plaza.
The Collected Stories of Isaac Bashevis Singer