ChU 6.3.3
तासां त्रिवृतं त्रिवृतम् एकैकां करवाणीति । सेयं देवतेमास् तिस्रो देवता अनेनैव जीवेनात्मनानुप्रविश्य नामरूपे व्याकरोत्
tāsāṃ trivṛtaṃ trivṛtam ekaikāṃ karavāṇīti | seyaṃ devatemās tisro devatā anenaiva jīvenātmanānupraviśya nāmarūpe vyākarot
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
'Then that Being having said, Let me make each of these three tripartite (so that fire, water, and earth should each have itself for its principal ingredient, besides an admixture of the other two) entered into those three beings (devatâ) with this living self only, and revealed names and forms.
Translated by F. Max Müller