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.

Numbers 6:9

Contingencies for Defilement

6:9 “‘If anyone dies very suddenly beside him and he defiles his consecrated head, then he must shave his head on the day of his purification – on the seventh day he must shave it.

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.

Acts 21:24

21:24 take them and purify yourself along with them and pay their expenses, so that they may have their heads shaved. Then everyone will know there is nothing in what they have been told about you, but that you yourself live in conformity with the law.

Acts 21:26

21:26 Then Paul took the men the next day, and after he had purified himself along with them, he went to the temple and gave notice of the completion of the days of purification, when the sacrifice would be offered for each of them.