RV 1.143.3
अस्य त्वेषा अजरा अस्य भानवः सुसंदृशः सुप्रतीकस्य सुद्युतः । भात्वक्षसो अत्य् अक्तुर् न सिन्धवो ऽग्ने रेजन्ते अससन्तो अजराः ॥
asya tveṣā ajarā asya bhānavaḥ susaṃdṛśaḥ supratīkasya sudyutaḥ | bhātvakṣaso aty aktur na sindhavo 'gne rejante asasanto ajarāḥ ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
His flames that wax not old, beams fair to look upon of him whose face is lovely, shine with beauteous sheen. The rays of Agni, him whose active force is light, through the nights glimmer sleepless, ageless, like the floods.
Translated by Ralph T. H. Griffith (1896)