The divine Sarasvati, repaired to the Aruna and overflowed it with her waters. This confluence of Sarasvati and Aruna is highly sacred!
ततोऽभ्येत्यारुणां देवीं प्लावयामास वारिणा॥ सरस्वत्यारुणायाश्च पुण्योऽयं संगमो महान्।