'Curse' in the Bible

And when it was day, certain of the Jews banded together, and bound themselves under a curse, saying that they would neither eat nor drink till they had killed Paul.

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

And they came to the chief priests and elders, and said, We have bound ourselves under a great curse, that we will eat nothing until we have slain Paul.

Don’t let them persuade you, because there are more than 40 of them arranging to ambush him, men who have bound themselves under a curse not to eat or drink until they kill him. Now they are ready, waiting for a commitment from you.”