This Bible contradiction is from the Skeptic's Annotated Bible.

Verses

Long hair on men is encouraged.

Numbers 6:5 View context

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.

---

Judges 13:5 View context

For, lo, thou shalt conceive, and bear a son; and no razor shall come on his head: for the child shall be a Nazarite unto God from the womb: and he shall begin to deliver Israel out of the hand of the Philistines.

---

1 Samuel 1:11 View context

And she vowed a vow, and said, O LORD of hosts, if thou wilt indeed look on the affliction of thine handmaid, and remember me, and not forget thine handmaid, but wilt give unto thine handmaid a man child, then I will give him unto the LORD all the days of his life, and there shall no razor come upon his head.

Long hair on men is shameful.

1 Corinthians 11:14 View context

Doth not even nature itself teach you, that, if a man have long hair, it is a shame unto him?