A more thorough explanation:

Wadia

Wadia is a historical term that refers to pledges.

• When borrowing money, a person may offer their car or house as wadia to ensure they will repay the loan.
• In medieval times, knights would offer their swords as wadia to show their loyalty to their lord.

These examples show how wadia was used as a form of security or guarantee. It was a way for someone to show they were serious about fulfilling their obligations, whether it was repaying a debt or demonstrating loyalty.