Summary

Talmud (Rodkinson Edition) — Book 3…

In places where it is customary to work till noon on the day preceding the Passover, work may be done; but not in places where it is not customary to work on that day. If a person should go from a place where the said custom prevails to another place where it does not, or the reverse, he is subject to the rigor of the custom, either of the place he came from or of that to which he went. Thus it is always proper not to act differently from the established customs of a place, on account of the disputes to which such conduct may lead.
Source: Wikisource

Talmud (Rodkinson Edition) — Book 3…

Why did the inhabitants of Jericho make use of plants growing on or near consecrated trees? They said: "Our ancestors only consecrated the wood of the trees, and if other plants subsequently grew on those trees, why should we prevent the poor people from making use of them? It does not constitute a trespass to partake of plants which subsequently grew on consecrated trees!" The sages, however, said: "A trespass-offering need not be brought if this was done, but it is a trespass nevertheless."
Source: Wikisource

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