Acts 18:18

And Paul still continued many days; and then taking leave of the brethren, sailed thence for Syria, and with him Priscilla and Aquila, having shaved his head at Cenchrea; for he had a vow.

Acts 21:23-24

Therefore do this that we say to thee: there are with us four men, who have a vow on them:

Philippians 3:8-9

Yea doubtless, and I account all things to be loss, for the excellency of the knowledge of Jesus Christ my Lord; for whom I have suffered the loss of all things, and do account them but dung,

Treasury of Scripture Knowledge

Summary

And if any man die very suddenly by him, and he hath defiled the head of his consecration; then he shall shave his head in the day of his cleansing, on the seventh day shall he shave it.

Bible References

Shave

Acts 18:18
And Paul still continued many days; and then taking leave of the brethren, sailed thence for Syria, and with him Priscilla and Aquila, having shaved his head at Cenchrea; for he had a vow.
Acts 21:23
Therefore do this that we say to thee: there are with us four men, who have a vow on them:
Philippians 3:8
Yea doubtless, and I account all things to be loss, for the excellency of the knowledge of Jesus Christ my Lord; for whom I have suffered the loss of all things, and do account them but dung,