Jñāneśvarī (commentary on the Bhagavadgītā) 5.87

5.87

tadbuddhayas tadātmānas tanniṣṭhās tatparāyaṇāḥ
gacchanty apunarāvṛttiṃ jñānanirdhūtakalmaṣāḥ
buddhiniścayeṃ ātmajñāna |
brhmarūpa hāvī āpaṇā āpaṇa |
brhmaniṣṭhā rākhe pūrṇa |
tatparāyaṇa aharniśīṃ ||

Through certainty of intellect comes knowledge of the Self; / one's own self becomes the very form of Brahman; / one firmly maintains establishment in Brahman, / devoted to That day and night.