Bhagavad Gita 6.31

The sage who realizes the unity of life and who worships Me in all beings, lives in Me, no matter what their lot may be.

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

sarvabhūtasthitaṃ yo māṃ bhajatyekatvamāsthitaḥ|
sarvathā vartamāno'pi sa yogī mayi vartate||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).