यस्यामृचि तामृचं यदार्षेयं तमृषिं यां देवतामभिष्टोष्यन्स्यात्तां देवतामुपधावेत् ॥ १.३.९ ॥
In plain words
Let him take refuge in the verse in which it is, and in the seer of the line to which it belongs, and in the deity to which he is about to sing praise.