The Compendium of Bheḷa 1.17.7

1.17.7

triṃśataṃ copanāhānāṃ sthāneṣv aṣṭāsu tattvataḥ | sūtrasthānaṃ cikitsā ca triṃśatriṃśadihocyate ||

and the thirty poultice-bandages across the eight sections in their true nature. / The section on aphorisms and therapeutics are each said to have thirty chapters here;