One who conquers sleep is called gudakesa (Chapter 1 Text 24)
- Hare Krishna Friends,
Chapter 1: Observing the Armies on the Battlefield of Kuruksetra
evam ukto hrsikeso
senayor ubhayor madhye
sanjayah--Sanjaya; uvaca--said; evam--thus; uktah--addressed; hrsikesah--Lord Krsna; gudakesena--by Arjuna; bharata--O descendant of
Bharata; senayoh--of armies; ubhayoh--of both; madhye--in the midst of; sthapayitva--by placing; ratha-uttamam--the finest chariot.
Sanjaya said: O descendant of Bharata, being thus addressed by Arjuna, Lord Krsna drew up the fine chariot in the midst of the armies of both parties.
In this verse Arjuna is referred to as Gudakesa. Gudaka means sleep, and one who conquers sleep is called gudakesa. Sleep also means
ignorance. So Arjuna conquered both sleep and ignorance because of his friendship with Krsna. As a great devotee of Krsna, he could not forget
Krsna even for a moment, because that is the nature of a devotee. Either in waking or in sleep, a devotee of the Lord can never be free
from thinking of Krsna's name, form, qualities and pastimes. Thus a devotee of Krsna can conquer both sleep and ignorance simply by
thinking of Krsna constantly. This is called Krsna consciousness, or samadhi. As Hrsikesa, or the director of the senses and mind of every
living entity, Krsna could understand Arjuna's purpose in placing the chariot in the midst of the armies. Thus He did so, and spoke as
Source: As It Is by HDG. A.C. BhaktiVedanta Swami Srila Prabhupada