Talmud Nedarim 2a

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Mishnah

All the alternate forms of vows are like vows; those of haramim are like haramim; those of oaths are like oaths, and those of nazirite vows are like nazirite vows.

If one says to his fellow: "I am avowed from you", [or] "I am set apart from you," [or] "I stay away from you", "regarding what I might eat of yours" or "what I might taste of yours,' he is prohibited. If he says: "I am banned to you," then Rabbi Akiva was hesitantly inclined to rule stringently.