Yājñavalkya Śikṣā 196

196

madhuraṃ cāpi nāvyaktaṃ suvyaktaṃ na ca pīḍitam
sanāthasyaiva deśasya na varṇāḥ saṅkaraṃ gatāḥ

Sweet and not indistinct, well manifest and not compressed; / the speech sounds do not become confused, as if in a well-protected land.