Matthew 3:4

This very John had his clothing made of camel's hair, and wore a leather belt around his waist; his food was dried locusts and wild honey.

Matthew 16:24

Then Jesus said to His disciples: "If anyone wants to be my disciple, he must say 'No' to self, put his cross on his shoulders, and keep on following me.

John 21:7

So that disciple whom Jesus used to love tenderly said to Peter, "It is the Lord!" When Simon Peter heard that it was the Lord, he belted on his fisherman's coat, for he had taken it off, and plunged into the sea.

Acts 19:16

So the man in whom the evil spirit was, leaped upon them and so violently overpowered two of them that they ran out of the house stripped of their clothes and wounded.

Revelation 11:3

And I will permit my two witnesses, clothed in sackcloth, to prophesy for one thousand, two hundred and sixty days."

Treasury of Scripture Knowledge

Summary

At the same time spake the LORD by Isaiah the son of Amoz, saying, Go and loose the sackcloth from off thy loins, and put off thy shoe from thy foot. And he did so, walking naked and barefoot.

Bible References

The sackcloth

Matthew 3:4
This very John had his clothing made of camel's hair, and wore a leather belt around his waist; his food was dried locusts and wild honey.
Revelation 11:3
And I will permit my two witnesses, clothed in sackcloth, to prophesy for one thousand, two hundred and sixty days."

Naked

John 21:7
So that disciple whom Jesus used to love tenderly said to Peter, "It is the Lord!" When Simon Peter heard that it was the Lord, he belted on his fisherman's coat, for he had taken it off, and plunged into the sea.
Acts 19:16
So the man in whom the evil spirit was, leaped upon them and so violently overpowered two of them that they ran out of the house stripped of their clothes and wounded.