NET
12 When morning came, the Jews formed a conspiracy and bound themselves with an oath not to eat or drink anything until they had killed Paul.
Darby
12 And when it was day, the Jews, having banded together, put themselves under a curse, saying that they would neither eat nor drink till they should kill Paul.
KJV
12 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.