Having ascertained (by calculation) that her husband's death would take place on the fourth day (thence), that observant of the Triratra vow, fasted day and night.
चतुर्थेऽहनि मर्तव्यमिति संचिन्त्य भाविनी। व्रतः त्रिरात्रमुद्दिश्य दिवारानं स्थिताभवत्॥