Bhagavad Gita Chapter 7.21
yo yo yāḿ yāḿ tanuḿ bhaktaḥ
śraddhayārcitum icchati
tasya tasyācalāḿ śraddhāḿ
tām eva vidadhāmy aham
Translation
I am in everyone’s heart as the Supersoul. As soon as one desires to worship some demigod, I make his faith steady so that he can devote himself to that particular deity.