Bhagavad Gita, Chapter 7, Verse 21

Whatsoever form any devotee seeks to worship with faith, that faith of his do I make unwavering.

Even a real, more limited kind of faith is described as being genuinely supported, not dismissed or blocked.

This is a surprisingly generous response to the previous verse's pattern. Rather than withholding support from someone worshipping in a narrower way, that same real sincerity is described as being honored and strengthened, wherever it's actually directed.