Matsya Purana 266.32

266.32

pāṭenācchādayet śvabhraṃ śuklenopari yatnataḥ.
tata utthāpya deveśamiṣṭadeśe tu śobhane .. 266.31

Salutations always to Varuṇa who is white in appearance, the image of Viṣṇu, the Lord of waters armed with a noose, having sturdy arms Salutations to Vāyu who diffuses all the aromas has a banner in His hand I salute Chandramâ who is fair, simple, presiding over all herbs the Lord of all the stars and planets My salutations to Iśāna Puruṣa who is white, the master of all the lores armed with a trident and of three eyes I always salute Lord Brahmā born of a lotus, with four faces, dressed in the garment of the Vedas, the Lord of sacrifices My salutations to Viṣṇu of infinite form who holds the whole universe, and who holds this earth as if she were a flower At the time of sacrifices and of making gifts these mantras should be recited and the mantras should be prefixed with the sacred Oṃ They are the givers of prosperity and progeny After finishing the Nyāsa with these mantras the consecrated idols should be rubbed with clarified butter and then they should be dressed in white cloths and devoutfully worshipped.—24 32

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