The Compendium of Bheḷa 7.6.7

7.6.7

caturaṅgulasiddhā vā peyā yojyā susaṃskṛtā | viricyate tenasādhu nāyogo nātiyogitā ||

Or a well-prepared peyā cooked with caturaṅgula should be administered; / by that he is properly purged; there is neither under-action nor excessive action.