Ezekiel 44:20

And their head they do not shave, and the lock they do not send forth; they certainly poll their heads.

Numbers 6:5

'All days of the vow of his separation a razor doth not pass over his head; till the fulness of the days which he doth separate to Jehovah he is holy; grown up hath the upper part of the hair of his head.

Leviticus 21:5-24

they do not make baldness on their head, and the corner of their beard they do not shave, and in their flesh they do not make a cutting;

Deuteronomy 14:1

Sons ye are to Jehovah your God; ye do not cut yourselves, nor make baldness between your eyes for the dead;

1 Corinthians 11:14

doth not even nature itself teach you, that if a man indeed have long hair, a dishonour it is to him?

Treasury of Scripture Knowledge

Summary

Neither shall they shave their heads, nor suffer their locks to grow long; they shall only poll their heads.

General references

Bible References

Shave

Leviticus 21:5
they do not make baldness on their head, and the corner of their beard they do not shave, and in their flesh they do not make a cutting;
Deuteronomy 14:1
Sons ye are to Jehovah your God; ye do not cut yourselves, nor make baldness between your eyes for the dead;

Nor suffer

Numbers 6:5
'All days of the vow of his separation a razor doth not pass over his head; till the fulness of the days which he doth separate to Jehovah he is holy; grown up hath the upper part of the hair of his head.
1 Corinthians 11:14
doth not even nature itself teach you, that if a man indeed have long hair, a dishonour it is to him?

General references

Leviticus 19:27
'Ye do not round the corner of your head, nor destroy the corner of thy beard.