Māndukya 3.05
तैजसस्योत्वविज्ञाने उत्कर्षो दृश्यते स्फुटम्। मात्रासम्प्रतिपत्तौ स्यादुभयत्वं तथाविधम् ॥५॥
taijasasyotvavijñāne utkarṣo dṛśyate sphuṭam। mātrāsampratipattau syādubhayatvaṃ tathāvidham ॥5॥
[तैजसस्य (taijasasya) - of Taijasa; (the dream state consciousness); उत्व (utva) - in the 'U' syllable; (state of being); विज्ञाने (vijñāne) - in knowledge; (awareness); उत्कर्षः (utkarṣaḥ) - excellence; (superiority); दृश्यते (dṛśyate) - is seen; (is observed); स्फुटम् (sphuṭam) - clearly; (distinctly); मात्रा (mātrā) - of the measure / syllable; (unit); सम्प्रतिपत्तौ (sampratipattau) - in the attainment; (realization); स्यात् (syāt) - there may be; (might be); उभयत्वम् (ubhayatvam) - duality; (both-ness); तथाविधम् (tathāvidham) - of such kind; (of that nature);]
By meditating on the syllable 'U', the Taijasa form (the dream state consciousness), excellence of awareness clearly becomes evident. When the syllable (U) is attained, there may be a duality of such a nature.