Bhagavad Gita · 13.19

इति क्षेत्रं तथा ज्ञानं ज्ञेयं चोक्तं समासतः।मद्भक्त एतद्विज्ञाय मद्भावायोपपद्यते॥

iti kṣhetraṁ tathā jñānaṁ jñeyaṁ choktaṁ samāsataḥ mad-bhakta etad vijñāya mad-bhāvāyopapadyate

Thus the field, knowledge, and the object of knowledge have been briefly described. My devotee, understanding this, becomes qualified to attain my nature.

— Bhagavad Gita 13.19

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)