Now due to the brāhmaṇas’ curse the Yadu dynasty will certainly perish by fighting among themselves; and on the seventh day from today the ocean will rise up and inundate this city of Dvārakā.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
कुलं वै शापनिर्दग्धं नङ्क्ष्यत्यन्योन्यविग्रहात् । समुद्रः सप्तमेऽह्न्येतां पुरीं च प्लावयिष्यति
kulaṃ vai śāpanirdagdhaṃ naṅkṣyatyanyonyavigrahāt | samudraḥ saptame'hnyetāṃ purīṃ ca plāvayiṣyati
SB 11.7.3