Brahma Sutras
ॐ नात्मा अश्रुतेर्नित्यत्वाच्च ताभ्यः ॐ ॥ २-३-१७॥
The individual soul has no origin; because the Upanishads do not mention this, because its eternality is known from them and (because of other reasons).
english translation
OM nAtmA azruternityatvAcca tAbhyaH OM ॥ 2-3-17॥
hk transliteration by Sanscript