Likutei Moharan 49:11/ליקוטי מוהר"ן מ״ט:י״א

111. Alternatively, demonstrating great magnanimity by distributing money demonstrates that the bride <becomes> the aspect of heh, that the dalet is made into a heh. This brings to great riches, in the aspect of (Malachi 3:10), “and pour down blessings on you until it is BLi DaI (without limit)”—until your lips yiBLu (become exhausted) from saying “DaI! (Enough!)” (Shabbat 32b). <In other words, distributing> the money indicates that they have obtained this blessing, to the point where the money is of no consequence to them.

2And this is the explanation of “asirit (a tenth) of an ayphah”— ASiRiT, which is the aspect of ay peh. In other words, their peh (mouths) became exhausted from saying “Dai!” because they have such great AShiRuT (riches). And this is because “one-fourth HaHin”—a dalet is made into a heh, as explained above.

3From Likutey Moharan I, 32 until here is entirely leshon Rabbeinu, of blessed memory, except for a few places in which I added a bit of material based on what I heard and understood from his holy lips or from his manuscript, as indicated each time in its place.