Skandapurana 1.4.59.131

1.4.59.131

aṣṭottaraśataṃ sahasraṃ lakṣaṃ koṭiṃ ceti yathāśakti japtvā daśāṃśahomārthe gaṇeśāgnaye āvāhayāmīti agnimāvāhya ..

Having recited one hundred and eight, a thousand, a hundred thousand, or ten million times according to his capacity, he invokes the fire for the sake of the tenth-part fire sacrifice, saying, “I invoke [the fire] for Gaṇeśa's fire”;