Devibhagavatapurana 3.27.54

3.27.54

vyāsa uvāca |
iti vipravacaḥ śrutvā sa vaiśyastaṃ dvijaṃ gurum |
kṛtvā jagrāha sanmantraṃ māyābījābhidhaṃ nṛpa ||

Vyâsa said:-- O king! That Vais’ya, hearing thus the Brâhmin’s words, made him his Guru, was initiated by him in the seed mantra of Mâyâ and ceaselessly, without any laziness, recited slowly the mantram for nine nights and worshipped the Devî, with great caution and with various offerings. Thus for nine consecutive years he devoted himself to the Japam (reciting slowly) of the seed mantra of Mâyâ till, at last, when the ninth year was completed, the Great Goddess appeared distinctly before his eyes on the night of the great Astamî tithi (the eighth day of the bright half) and gave him various boons and delivered the Vais’ya from poverty and bestowed on him wealth and his other desired things.
Here ends the 27th Chapter on the virgins fit to be worshipped and the Glory of the Devî in the Mahâ Purânam S’rîmad Devî Bhâgavatam by Maharsi Veda Vyâsa in the Third Adhyâya.