यस्मात्तेर्वाक्प्रवर्तन्ते ततोर्वाकूस्रोतसस्तु ते / ते च प्रकाशबहुलास्तमस्पृष्टरजोधिकाः
yasmāttervākpravartante tatorvākūsrotasastu te / te ca prakāśabahulāstamaspṛṣṭarajodhikāḥ
Because they proceed upward, they are known as the Ūrdhvākū-srotas; they abound in light, are untouched by tamas, and are rajas-dominant.