Garudapurana 1.43.28

1.43.28

dattvā paṭhedimaṃ mantraṃ pūjayitvā maheśvaram /
āvāhito 'si deveśa pūjārthaṃ parameśvara //

Having offered it, one should recite this mantra after worshiping Maheśvara: / 'You are invoked, O Lord of gods, for worship, O Supreme Lord;