Bhagavad Gita, Chapter 9, Verse 22

Persons who, meditating on Me as non-separate, worship Me in all beings, to them thus ever jealously engaged, I carry what they lack and preserve what they already have.

Single-minded devotion comes with a direct promise, not a vague sense of general goodwill.

What's offered isn't an abstract blessing, it's two concrete things: providing what's missing and protecting what's already there. That specificity is what makes the promise feel solid rather than ceremonial.