Ashtangasamgraha 44.17

Śaśilekhā 44.17

tatra caturvidhaṃ śalyaṃ prakīrtitaṃ vṛttaṃ dvyasraṃ tryasraṃ caturasraṃ ca | sarvamadṛśyamānaṃ vraṇākṛtyā kalpayet |