משנה על מעשר שני 1:1

Second tithe: one may not sell it, use it as a pledge, exchange it, or use it as a weight. One may not say to his friend [even] in Jerusalem: “Here is [second tithe] wine, give me [in exchange] oil, and the same with all other produce. But people may give it to one another as a free gift.

Tithe of cattle: one may not sell it when it is unblemished and alive, and when it is blemished [one may not sell it] neither alive nor slaughtered, nor may one betroth a woman with it. A first-born animal: one may sell it when it is unblemished and alive, and when blemished [one may sell it] both alive and slaughtered, and one may betroth a wife with it. One may not redeem second tithe with unstamped coins, nor with coins which are not current, nor for money which is not in one's possession.

One who bought a domesticated animal for a shelamim offering or a wild animal for non-sacrificial eating, the hide becomes hullin [non-sacred], even though the value of the hide exceeds the value of the flesh. Sealed jars of wine [which were bought] in a place where they were usually sold sealed, the jars are hullin. Walnuts and almonds, their shells become hullin. Grape-skin wine: before it has fermented it cannot be bought with second tithe money, but after it has fermented it may be bought with second tithe money.