vyustam rocisam atapam
pañcayamo ’tha bhutani
yena jagrati karmasu
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Usa, the wife of Vibhavasu, gave birth to three sons — Vyusta, Rocisa and Atapa. From Atapa came Pañcayama, the span of day, who awakens all living entities to material activities.