Vaishnava Dharmashastra 9.12

9.12

dviguṇe 'rthe yathābhihitāḥ samayakriyā vaiśyasya ||

If the amount (of the matter in contest) is twice as high (as in each of the last-mentioned cases), a Vaisya must (in each case) undergo that ordeal which has (just) been ordained (for a Sûdra);