Bhagavad Gita 7.21
यो यो यां यां तनुं भक्तः श्रद्धयार्चितुमिच्छति। तस्य तस्याचलां श्रद्धां तामेव विदधाम्यहम्।।7.21।।
yo yo yāṃ yāṃ tanuṃ bhaktaḥ śraddhayārcitumicchati| tasya tasyācalāṃ śraddhāṃ tāmeva vidadhāmyaham||7.21||
yo yo yam yam tanum bhaktah shraddhayarcitumicchati tasya tasyacalam shraddham tameva vidadhamyaham7.21
Meaning
Whatever form of deity a devotee wishes to worship with faith, Krishna makes that faith of theirs steady and firm. God supports all sincere seekers.
जो-जो भक्त जिस-जिस रूप को श्रद्धा से पूजना चाहता है, उस-उस की मैं उस ही देवता के प्रति श्रद्धा को स्थिर करता हूँ।
This is verse 21 of 30 in Chapter 7 (Jnana Vijnana Yoga) of the Bhagavad Gita.