Bhagavad Gita · 6.31

सर्वभूतस्थितं यो मां भजत्येकत्वमास्थितः।सर्वथा वर्तमानोऽपि स योगी मयि वर्तते॥

sarva-bhūta-sthitaṁ yo māṁ bhajaty ekatvam āsthitaḥ sarvathā vartamāno 'pi sa yogī mayi vartate

The yogi who, established in oneness, worships Me dwelling in all beings — that yogi, regardless of their external circumstances, lives in Me.

— Bhagavad Gita 6.31

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