मनुस्मृति – राजधर्म

परमं यत्नमातिष्ठेत् स्तेनानां निग्रहे नृपः |
स्तेनानां निग्रहादस्य यशो राष्ट्रं च वर्धते ||

- मनुस्मृति

It is one of the foremost duties of a king to nab thieves and keep them behind bars. Doing so will spread good word about him and the state. It will also increase the wealth of the state.

- Manusmriti