Su, Sū., 10, 8.2 tadyathā śrotriyanṛpatistrībālavṛddhabhīrurājasevakakitavadurbalavaidyavidagdhavyādhigopakadaridrakṛpaṇakrodhanānām anātmavatām anāthānāṃ ca evaṃ nirūpya cikitsāṃ kurvan dharmārthakāmayaśāṃsi prāpnoti //

AṣṭNigh, 1, 372.1 ukṣān aḍvān balīvardaḥ surabhirgopakaḥ smṛtaḥ /

DhanvNigh, Candanādivarga, 61.3 gopakaṃ nālikaṃ pauraṃ viṣaṃ gandharasaṃ viduḥ //

KSS, 8, 4, 80.2 jālikaś caṇḍadattaś ca gopakaḥ somilo 'pi ca //