Numbers 6:5
All the days of the vow of his separation there shall no razor come upon his head: until the days be fulfilled, in the which he separateth himself unto the Lord, he shall be holy, and shall let the locks of the hair of his head grow.
Cross-reference
Numbers 6:2 introduces the Nazirite vow, grounding the hair rule in the broader law.
Numbers 6:4 gives another regulation of the Nazirite vow, abstaining from vine products, part of the same law.
Numbers 6:11 provides the purification offering if a Nazirite becomes defiled, a different but related rule.
Numbers 6:18 describes the Nazirite shaving and burning his hair at the completion of the vow, concluding the hair's consecration.
Judges 13:5 directly applies the no-razor rule from Numbers 6:5 to Samson, a Nazirite from birth.
In Judges 16:17, Samson reveals his Nazirite vow, including the same prohibition against cutting his hair, showing the vow in practice.
Judges 16:19 shows the consequence of violating the Nazirite vow: Delilah cuts his hair, and his strength departs.
In 1 Samuel 1:11, Hannah vows that no razor will touch her son's head, making Samuel a lifelong Nazirite like the law.
Acts 18:18 shows Paul shaving his head after completing a vow, illustrating the Nazirite practice of shaving at the end, fulfilling the vow's conclusion.
Acts 21:24 describes men with a vow shaving their heads, directly reflecting the Nazirite vow completion ritual, confirming the practice.
In Ezekiel 44:20, priests are told not to let hair grow long, opposite the Nazirite's unshorn hair. Both regulate hair for holy service but with contrasting rules.