Acts 23:21

But, do not listen to them, because over forty men have laid a plot and bound themselves under an oath [with serious consequences] neither to eat nor drink [anything] until they have killed him. They are now ready [to carry out the plot] and are just waiting for you to agree [to their arrangement]."

Acts 23:12-14

When daylight came, [a group of] Jews conspired together, agreeing under oath that they would neither eat nor drink until they had killed Paul.

Acts 9:23-24

And after a number of days had passed [these] Jews conspired together to kill Saul,

Acts 14:5-6

And when the Jews, along with their rulers and [unconverted] Gentiles, all mounted an attack, intending to stone them,

Acts 20:19

[You know that] I served the Lord with humility, with tears and with trials that I experienced as the result of plots by the Jews.

Acts 25:3

to do them a favor by having Paul brought [from Caesarea] to Jerusalem, for they were plotting to kill him on the way.

Romans 9:3

For I could wish that I, personally, were cut off from Christ [and lost] for the sake of my brothers, who are my physical relatives,

2 Corinthians 11:26

I have been on frequent journeys; in danger from rivers; in danger from thieves; in danger from my own people; in danger from the Gentiles; in danger in the city; in danger in the desert; in danger in the ocean; in danger among false brothers.

2 Corinthians 11:32-33

[When I was] in Damascus [Note: Paul here refers to his conversion. See Acts 9:1ff], the governor [who served] under King Aretas, was guarding the city of the Damascenes in order to capture me,

Treasury of Scripture Knowledge

Summary

But do not thou yield unto them: for there lie in wait for him of them more than forty men, which have bound themselves with an oath, that they will neither eat nor drink till they have killed him: and now are they ready, looking for a promise from thee.

Bible References

For

Acts 23:12
When daylight came, [a group of] Jews conspired together, agreeing under oath that they would neither eat nor drink until they had killed Paul.
Acts 9:23
And after a number of days had passed [these] Jews conspired together to kill Saul,
Acts 14:5
And when the Jews, along with their rulers and [unconverted] Gentiles, all mounted an attack, intending to stone them,
Acts 20:19
[You know that] I served the Lord with humility, with tears and with trials that I experienced as the result of plots by the Jews.
Acts 25:3
to do them a favor by having Paul brought [from Caesarea] to Jerusalem, for they were plotting to kill him on the way.
2 Corinthians 11:26
I have been on frequent journeys; in danger from rivers; in danger from thieves; in danger from my own people; in danger from the Gentiles; in danger in the city; in danger in the desert; in danger in the ocean; in danger among false brothers.

An oath

Acts 23:14
They went to the leading priests and [Jewish] elders and told them, "We have bound ourselves under an oath [with serious consequences] to eat nothing until we have killed Paul.
Romans 9:3
For I could wish that I, personally, were cut off from Christ [and lost] for the sake of my brothers, who are my physical relatives,