CC Madhya 24.132
na śocati na kāṅkṣati
samaḥ sarveṣu bhūteṣu
mad-bhaktiṁ labhate parām
“ ‘One who is thus transcendentally situated at once realizes the Supreme Brahman and becomes fully joyful. He never laments or desires to have anything; he is equally disposed to every living entity. In that state he attains pure devotional service unto Me.’
This is a quotation from the Bhagavad-gītā (18.54).