Dovid Bornsztain, also spelled Borenstein, Bornstein and Bernstein, known as the Chasdei Dovid, was the third Rebbe of the Sochatchov Hasidic dynasty. He succeeded his father, Rabbi Shmuel Bornsztain, as Rebbe upon the latter's death in 1926.

Sochatchov is a Hasidic dynasty originating from the town of Sochaczew, Poland, where it was founded by Avrohom Bornsztain (1838–1910). Sochatchov is a branch of Kotzk Hasidism, which in part is a branch of Peshischa Hasidism. After World War I the dynasty was moved to Łódź and, subsequently, to other nearby towns. After World War II the dynasty was transplanted to Israel, where it thrives to this day.