तासां त्रिवृतं त्रिवृतमेकैकां करवाणीति सेयं देवतेमास्तिस्रो देवता अनेनैव जीवेनात्मनानुप्रविश्य नामरूपे व्याकरोत् ॥ ६.३.३ ॥
In plain words
Let me make each one of them threefold.' And that deity entered into these three deities with this very living self and unfolded name and form.