Bhagavatapurana 8.17.2

8.17.2

cintayanty ekayā buddhyā mahāpuruṣamīśvaram /
pragṛhyendriyaduṣṭāśvān manasā buddhisārathiḥ //

2. Meditating with undivided attention on (with concentration) the great Person and Ruler of the Universe, with the wild horses of the senses curbed by the power of her mind, with reason for her charioteer;