3 Bible Verses about Vowing To Fast

In the morning, the Jews made a conspiracy and took an oath not to eat or drink till they had killed Paul.

and they went to the high priests and elders and said to them, "We have taken a solemn oath not to touch anything to eat till we have killed Paul.

But do not let them persuade you, for more than forty of them are lying in wait for him, and they have taken an oath not to eat or drink till they have killed him. They are all ready now, and are only waiting to get your promise."