RV 4.42.4
अहम् अपो अपिन्वम् उक्षमाणा धारयं दिवं सदन ऋतस्य । ऋतेन पुत्रो अदितेर् ऋतावोत त्रिधातु प्रथयद् वि भूम ॥
aham apo apinvam ukṣamāṇā dhārayaṃ divaṃ sadana ṛtasya | ṛtena putro aditer ṛtāvota tridhātu prathayad vi bhūma ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
I made to flow the moisture-shedding waters, and set the heaven firm in the scat of Order. By Law the Son of Aditi, Law Observer, hath spread abroad the world in threefold measure.
Translated by Ralph T. H. Griffith (1896)