Commentary on the Nyāyasūtra 1.p30

Nyāyabhāṣya (complete text) 1.p30

nigrahasthānabhyaḥ pṛthaguddiṣṭa hetvābhāsāḥ, vāde caudanīyā bhaviṣyantīti| jalpavitaṇḍayostu nigrahasthānānīti|