एवमेवोद्गातारमुवाचोद्गातर्या देवतोद्गीथमन्वायत्ता तां चेदविद्वानुद्गास्यसि मूर्धा ते विपतिष्यतीति ॥ १.१०.१० ॥
In plain words
In the same way he said to the Udgātṛ, "Udgātṛ, if thou singest the Udgītha without knowing the deity that belongs to it, thy head shall fall off."