Srimad Bhagavatam Canto 04, Chapter 28, Text 38

 SB 4.28.38

tapasa vidyaya pakva-
 kasayo niyamair yamaih
yuyuje brahmany atmanam
 vijitaksanilasayah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
By worshiping, executing austerities and following the regulative principles, King Malayadhvaja conquered his senses, his life and his consciousness. Thus he fixed everything on the central point of the Supreme Brahman [Krsna].
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Whenever the word brahman appears, the impersonalists take this to mean the impersonal effulgence, the brahmajyoti. Actually, however, Parabrahman, the Supreme Brahman, is Krsna, Vasudeva. As stated in Bhagavad-gita (7.19), vasudevah sarvam iti: Vasudeva extends everywhere as the impersonal Brahman. One cannot fix one’s mind upon an impersonal “something.” Bhagavad-gita (12.5) therefore says, kleso ’dhikataras tesam avyaktasakta-cetasam: “For those whose minds are attached to the unmanifested, impersonal feature of the Supreme, advancement is very troublesome.” Consequently, when it is said herein that King Malayadhvaja fixed his mind on Brahman, “Brahman” means the Supreme Personality of Godhead, Vasudeva.
Srimad Bhagavatam Canto 04, Chapter 28, Text 37
Srimad Bhagavatam Canto 04, Chapter 28, Text 39