RV 6.10.4
आ यः पप्रौ जायमान उर्वी दूरेदृशा भासा कृष्णाध्वा । अध बहु चित् तम ऊर्म्यायास् तिरः शोचिषा ददृशे पावकः ॥
ā yaḥ paprau jāyamāna urvī dūredṛśā bhāsā kṛṣṇādhvā | adha bahu cit tama ūrmyāyās tiraḥ śociṣā dadṛśe pāvakaḥ ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
He, at his birth, whose path is black behind him, filled heaven and earth with far-apparent splendour: And he himself hath been. through night's thick darkness, made manifest by light, the Purifier.
Translated by Ralph T. H. Griffith (1896)