Bhagavatapurana 9.9.49

9.9.49

yat tadbrahma paraṃ sūkṣmamaśūnyaṃ śūnyakalpitam /
bhagavān vāsudeveti yaṃ gṛṇanti hi sātvatāḥ //

48. & 49. Having thus resolved by power of his Reason, with his mind taken up with Narayana, he shunned every other thought as a wrong notion, and attained to his essential state, which is Parabrahman, very subtle, something positive, thought of as nothing and which the gods sing under the names of Bhagavan and Vasudeva.