Acts 21:23

Therefore do what we tell you: We have four men who have obligated themselves with a vow.

Acts 18:18

So Paul, having stayed on for many days, said good-bye to the brothers and sailed away to Syria. Priscilla and Aquila were with him. He shaved his head at Cenchreae because he had taken a vow.

Numbers 6:2-7

“Speak to the Israelites and tell them: When a man or woman makes a special vow, a Nazirite vow, to consecrate himself to the Lord,

Treasury of Scripture Knowledge

Summary

Do therefore this that we say to thee: We have four men which have a vow on them;

Bible References

We have

Acts 18:18
So Paul, having stayed on for many days, said good-bye to the brothers and sailed away to Syria. Priscilla and Aquila were with him. He shaved his head at Cenchreae because he had taken a vow.
Numbers 6:2
“Speak to the Israelites and tell them: When a man or woman makes a special vow, a Nazirite vow, to consecrate himself to the Lord,

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.