Jñāneśvarī (commentary on the Bhagavadgītā) 3.39

3.39

kāṃ pūrvāpara saritā |
bhinnā disatī pāhatāṃ |
maga siṃdhumiḷaṇīṃ aikyatā |
pāvat śekhīṃ ||

Or as eastern and western rivers / appear distinct when viewed, / but in their merging into the ocean / they attain unity in the end;