Jñāneśvarī (commentary on the Bhagavadgītā) 2.129

2.129

nā tarī jāṇivecyā āyaṇī |
karitāṃ dadhikaḍasaṇī |
maga navanīta nirvāṇīṃ |
dise jaiseṃ ||

Or just as, by the skillful art of knowledge, / when curds are churned, / butter is seen / in the end;