Nedarim, Chapter 11, Mishnah 8. This Mishnah deals with a man who vowed that his son-in-law may not derive any benefit or advantage from him, yet he still wants to give a sum of money to his daughter, who is married to that son-in-law. Here a problem arises: normally, when a woman acquires money, her husband becomes the legal owner of that money, and so the father would be providing benefit to the very son-in-law who is forbidden to benefit from him.
The Mishnah's solution:
The Mishnah instructs the father to say a particular formula to his daughter as he gives her the money - "omer lah" - he says to her: "This money is given to you as a gift, on condition that your husband has no control over it, but only what you take up and put into your mouth from this money" - meaning the things she buys with it - "those are what I am giving you as a gift". Only at that very moment does the money become hers.
The Gemara's explanation:
The Gemara explains that this Mishnah was taught according to the view of Rabbi Meir, who holds that a woman's hand is like her husband's hand. According to his view, a simple stipulation that the husband will have no control over the money is not enough to prevent him from acquiring ownership and benefit. The father is therefore required to use a more precise formulation: only what the daughter puts into her mouth, what she actually uses, becomes hers.
Until that point the money remains in the father's possession, and the moment it comes directly for the daughter's benefit - at that very moment it becomes hers. It turns out that even according to Rabbi Meir the husband never holds it at all, since it arrives directly at his wife's use.
In summary: In this Mishnah we learned how a gift can be given to a daughter whose husband is forbidden to benefit from the giver: by using a formulation that limits the taking effect of the gift to the moment of actual use, so that the husband has no control over the money, and even according to Rabbi Meir - who holds that her hand is like her husband's hand - the money never passes into his possession at any stage.