Tevul Yom 4:4-5

T’vul Yom 4:4

Let’s say that a carafe was a t’vul yom and they filled it from a barrel of first tithe from which trumah was not yet taken (i.e., tevel). If the owner says, “Let this be trumas maaser after nightfall,” it becomes trumas maaser. If he says, “Let this be an eiruv,” he’s said nothing at all (because the contents of the barrel are not yet suitable to eat). If the barrel breaks, the contents of the carafe remain tevel; if the carafe breaks, the contents of the barrel remain tevel.

T’vul Yom 4:5

The Sages originally said that one may redeem second tithe with the produce of an unlearned person. Later, they revisited the matter and said that one might also redeem it with the money of an unlearned person. The Sages originally said that if a man was being taken out (i.e., to the secular authorities) in chains and he said, “Write a get for my wife,” they may write and deliver it. Later they revisited the matter and said that they might do so even if the man was leaving on a sea voyage or setting out with a caravan. Rabbi Shimon Shezuri says they may do so even if the man is critically ill.