Genesis 38:18

And he said, What pledge shall I give thee? And she said, Thy signet, and thy bracelets, and thy staff that is in thine hand. Tamar had thus made her plans with full attention to detail; she had a special reason for demanding Judah's seal-ring with its cord and the staff which he carried with him wherever he went, as badges of his dignity, by which he could definitely be identified. And he gave it her, and came in unto her, and she conceived by him, through the sin of incest.