Bhagavad Gita 14.11
सर्वद्वारेषु देहेऽस्मिन्प्रकाश उपजायते। ज्ञानं यदा तदा विद्याद्विवृद्धं सत्त्वमित्युत।।14.11।।
sarvadvāreṣu dehe'sminprakāśa upajāyate| jñānaṃ yadā tadā vidyādvivṛddhaṃ sattvamityuta||14.11||
sarvadvareshu dehe'sminprakasha upajayate jnanam yada tada vidyadvivriddham sattvamityuta14.11
Meaning
When the light of knowledge shines through all the gates (senses) of the body, then it should be known that Sattva is predominant.
जब इस देह के द्वारों अर्थात् समस्त इन्द्रियों में ज्ञानरूप प्रकाश उत्पन्न होता है, तब सत्त्वगुण को प्रवृद्ध हुआ जानो।
This is verse 11 of 27 in Chapter 14 (Gunatraya Vibhaga Yoga) of the Bhagavad Gita.