Kautilya's Arthashastra 4.2.13

4.2.13

tulāmānābhyām atiriktābhyāṃ krītvā hīnābhyāṃ vikrīṇānasya ta eva dviguṇā daṇḍāḥ //

When a merchant purchases by a false balance a greater quantity of a commodity and sells under the same nominal weight a less quantity by the same or another false balance, he shall be punished with double the above fines.