Matsya Purana 266.34

266.34

dhyātvā paramasadbhāvād devadevañca niṣkalam.
devavrataṃ tathā somaṃ rudrasūktaṃ tathaiva ca .. 266.33

Then raising the Deva with the mantra 'Dhruvâ Dyau,' it should be placed on the desired Śvabhra, fully ornamented Then placing one's hand on the head of the Deva one should recite Soma and Rudra Śūktas At that time one should make himself Divine like by placing himself under the influence of Somasukta or Rudrasukta mantras and should then meditate on the Deva according to His form.—33-34