Genesis 38:16-18

16So he turned aside to her along the way and said, “Please let me sleep with you” (for he did not know that she was his daughter-in-law). “What,” she asked, “will you give me to sleep with me?”

17“I will send you a young goat from the flock,” he said, “Provided you give a pledge until you send it,” she said.

18“What kind of pledge shall I give you?” he asked. “Your seal, and your cord, and your staff in your hand,” she said. So he gave them to her and he slept with her, and she got pregnant by him.