CHĀNDOGYA UPANISHAD · 1.3.12

आत्मानम् अन्तत उपसृत्य स्तुवीत कामं ध्यायन्न् अप्रमत्तः ।
अभ्याशो ह यद् अस्मै स कामः स्मृध्येत यत्कामः स्तुवीतेति यत्कामः स्तुवीतेति ॥

ātmānam antata upasṛtya stuvīta kāmaṃ dhyāyann apramattaḥ ।
abhyāśo ha yad asmai sa kāmaḥ smṛdhyeta yatkāmaḥ stuvīteti yatkāmaḥ stuvīteti ॥

Lastly, having approached himself (his name, family, &c.) by meditation, let him sing the hymn of praise, reflecting on his desire, and avoiding all mistakes in pronunciation, &c. Quickly will the desire be then fulfilled to him, for the sake of which he may have offered his hymn of praise, yea, for which he may have offered his hymn of praise.

F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)