vyuṣṭaṁ rociṣam ātapam
pañcayāmo ’tha bhūtāni
yena jāgrati karmasu
vibhāvasoḥ—of Vibhāvasu; asūta—gave birth to; ūṣā—named Ūṣā; vyuṣṭam—Vyuṣṭa; rociṣam—Rociṣa; ātapam—Ātapa; pañcayāmaḥ—Pañcayāma; atha—thereafter; bhūtāni—the living entities; yena—by whom; jāgrati—are awakened; karmasu—in material activities.
Ūṣā, the wife of Vibhāvasu, gave birth to three sons—Vyuṣṭa, Rociṣa and Ātapa. From Ātapa came Pañcayāma, the span of day, who awakens all living entities to material activities.
Link to this page: https://prabhupadabooks.com/sb/6/6/16