MuU 2.1.1
तदेतत् सत्यं यथा सुदीप्तात् पावकाद्विस्फुलिङ्गाः सहस्रशः प्रभवन्ते सरूपाः । तथाऽक्षराद्विविधाः सोम्य भावाः प्रजायन्ते तत्र चैवापि यन्ति
tadetat satyaṃ yathā sudīptāt pāvakādvisphuliṅgāḥ sahasraśaḥ prabhavante sarūpāḥ | tathā'kṣarādvividhāḥ somya bhāvāḥ prajāyante tatra caivāpi yanti
Sanskrit for this text is pending; the English follows the translator's numbering.
This is the truth. As from a blazing fire sparks, being like unto fire, fly forth a thousandfold, thus are various beings brought forth from the Imperishable, my friend, and return thither also.
Translated by F. Max Müller