Canto 1 - Boyhood
Bāla-kāṇḍa
Chapter 38: The History of Sagara
Text 1.38.19
अथ दीर्घेण कालेन रूपयौवनशालिनः।
षष्टिः पुत्रसहस्राणि सगरस्याभवंस्तदा॥
atha dīrgheṇa kālena rūpa-yauvana-śālinaḥ
ṣaṣṭiḥ putra-sahasrāṇi sagarasyābhavaṁs tadā
atha = thus; dīrgheṇa kālena = after a long period; rūpa-yauvana-śālinaḥ = filled with youthful beauty; ṣaṣṭiḥ putra-sahasrāṇi = the sixty thousand sons; sagarasya = of Sagara; abhavam tadā = became.
Thus, after a long period, the 60,000 sons of Sagara became filled with youthful beauty.