'Curse' in the Bible

Now when day came, the Jews formed a conspiracy and bound themselves under an oath (curse), saying that they would not eat or drink until they had killed Paul.

There were more than forty [men] who formed this plot [and swore this oath].

They went to the chief priests and elders and said, “We have bound ourselves under a solemn oath not to taste anything [neither food nor drink] until we have killed Paul.

But do not listen to them, for more than forty of them are lying in wait for him, and they have bound themselves with an oath not to eat or drink until they have killed him. Even now they are ready, just waiting for your promise.”