Numbers 6:9

‘The Nazirite shall then shave the head of hair for his Nazirite vow at the doorway of the tent of meeting and take the hair of his head of his Nazirite vow and put it on the fire which is under the sacrifice of peace offerings.

then you shall bring her home to your house, and she shall shave her head and trim her nails.

“And on the day that he goes into the sanctuary, into the inner court to minister in the sanctuary, he shall bring near his sin offering,” declares Lord Yahweh.

And Paul, having remained many days longer, took leave of the brothers and put out to sea for Syria, and with him were Priscilla and Aquila. In Cenchreae he had his hair cut, for he was keeping a vow.

Now when the seven days were almost over, the Jews from Asia, upon noticing him in the temple, began to throw all the crowd into confusion and laid hands on him,