In Jain tradition, I do not know of a clear, widely accepted historical proof that a specific king or great Jain personality formally rejected dowry in the modern sense. What we do have are Jain examples that strongly support simplicity, non-attachment, and opposition to excess. For example, Jain tradition says King Chetak was committed to marrying his daughters into Jain families, and Jain teachings on aparigraha discourage attachment to wealth and showy displays. ( jainknowledge.com)

So the honest Jain answer is: there is strong ethical support against dowry in Jainism, but direct “proof” of a famous historical king rejecting dowry is not something I can state confidently as established fact. The tradition more clearly emphasizes simple marriage, restraint, and non-possessiveness rather than recording a formal anti-dowry decree. ( jainknowledge.com)