A person who can control his senses fully is called vaśī, or self-controlled. In this connection it is stated in the Śrīmad-Bhāgavatam: “All the 16,000 wives of Kṛṣṇa were so exquisitely beautiful that their smiling and shyness were able to captivate the minds of great demigods like Lord Śiva. But still they could not even agitate the mind of Kṛṣṇa, in spite of their attractive feminine behavior.” Every one of the thousands of wives of Kṛṣṇa was thinking that Kṛṣṇa was captivated by her feminine beauty, but this was not the case. Kṛṣṇa is therefore the supreme controller of the senses, and this is admitted in the Bhagavad-gītā, where He is addressed as Hṛṣīkeśa-the master of the senses.
(The Nectar of Devotion » Chapter 21 » Self-controlled | 1972 Edition)
