Paribhashapradipa 3.71

Paribhāṣāpradīpa 3.71

anyaccaaṃgulibhyāṃ dṛḍhaṃ ghṛṣṭaṃ yadā cūrṇatvamāgatam
tadā siddhaṃ vijānīyāllohaṃ lohavidāṃ varaḥ