Bhagavad Gita 7.21

But whatever form of worship, if the devotee has faith, then I set My own seal upon their faith in that worship.

यो यो यां यां तनुं भक्तः श्रद्धयार्चितुमिच्छति।
तस्य तस्याचलां श्रद्धां तामेव विदधाम्यहम्॥

yo yo yāṃ yāṃ tanuṃ bhaktaḥ śraddhayārcitumicchati|
tasya tasyācalāṃ śraddhāṃ tāmeva vidadhāmyaham||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).