Nedarim 52: Curds and Whey
Food vows in the mishnah - first, swearing off milk (does that include whey?), or swearing off whey (does that include milk?). Plus, R. Tarfon, meat, and more. Also, one who swears off grapes (what about wine?) or olives (what about olive oil?). To what extent does the general casual phrasing have impact on the reach of the vow?