Judges 13:5

13:5 Look, you will conceive and have a son. You must never cut his hair, for the child will be dedicated to God from birth. He will begin to deliver Israel from the power of the Philistines.”

Numbers 6:5

6:5 “‘All the days of the vow of his separation no razor may be used on his head until the time is fulfilled for which he separated himself to the Lord. He will be holy, and he must let the locks of hair on his head grow long.

Acts 18:18

Paul Returns to Antioch in Syria

18:18 Paul, after staying many more days in Corinth, said farewell to the brothers and sailed away to Syria accompanied by Priscilla and Aquila. He had his hair cut off at Cenchrea because he had made a vow.