Ramayana 2.63.2

रामलक्ष्मणयोश्चैव विवासा द्वासवोपमम्।आविवेशोपसर्गस्तं तम स्सूर्यमिवासुरम्।।2.63.2।।

rāmalakṣmaṇayoś caiva vivāsād vāsavopamam | āviveśopasargas taṃ tamas sūryam ivāsuram || 2.63.2 ||

Because Rāma and Lakṣmaṇa were exiled, a great calamity seized Indra-like Daśaratha—like demonic darkness swallowing the sun at an eclipse.