Kautilya's Arthashastra 3.11.37

3.11.37

śūdraṃ "janmamaraṇāntare yad vaḥ puṇyaphalaṃ tad rājānaṃ gacched, rājñaś ca kilbiṣaṃ yuṣmān anyathāvāde, daṇḍaś cānubaddhaḥ, paścād api jñāyeta yathādṛṣṭaśrutam, ekamantrāḥ satyam upaharata" iti //

A Súdra witness thus:--‘Whatever thy merits are, in thy former birth or after thy death, shall they go to the king and whatever sins the king may have committed, shall they go to thee, if thou utterest falsehood; fines also shall be levied on thee, for facts as they have been heard or seen will certainly be subsequently revealed.’