Chandogya Upanishad 1.92

आदित्य इति होवाच सर्वाणि ह वा इमानि भूतान्यादित्यमुच्चैः सन्तं गायन्ति सैषा देवतोद्गीथमन्वायत्ता तां चेदविद्वानुदगास्यो मूर्धा ते व्यपतिष्यत्तथोक्तस्य मयेति ॥ ७ ॥

1.11.7 — aaditya iti hovacha sarvani ha va imani bhutanyadityamuchchaih santam gayanti saisha devatodgithamanvayatta tam chedavidvanudagasyo murdha te vyapatishyattathoktasya mayeti || 7 ||

He said: 'The sun (âditya). For all these beings praise the sun when it stands on high. This is the deity belonging to the udgîtha. If without knowing that deity, you had sung out your hymns, your head would have fallen off, after you had been warned by me.'

उषस्ति बोले — 'आदित्य। क्योंकि ये समस्त भूत आदित्य को उच्च-स्थित देखकर ही उसकी स्तुति गाते हैं। यही वह देवता है जो उद्गीथ से जुड़ा है। यदि तू उसे न जानकर उद्गान करता, तो मेरे चेताने पर भी तेरा मूर्धा गिर जाता।'