Matthew 3:11

I immerse you in water, in order to repentance; but he that comes after me is mightier than I, whose sandals I am not worthy to carry. He will immerse you in the Holy Spirit and in fire:

Luke 11:38-39

And when the Pharisee saw it, he wondered that he had not first immersed himself before dinner.

Ephesians 5:26-27

that he might sanctify it, having cleansed it by the bath of water through the word,

Hebrews 9:9-10

which, as a symbol, remains to the present time, in which are offered both gifts and sacrifices that can not make perfect, as it respects the conscience, him that does the service;

Hebrews 10:22

let us draw near with a true heart, in full assurance of faith, having; our hearts sprinkled from an evil conscience, and our bodies washed with pure water;

1 Peter 3:21

the likeness of which, even immersion, (not the putting away of the filth of the flesh, but the seeking of a good conscience toward God,) does now also save us, through the resurrection of Jesus Christ,

Revelation 1:5

and from Jesus Christ, who is the faithful witness, the first born from the dead, and the Prince of the kings of the earth. To him that loves us, and that has washed us from our sins in his own blood,

Treasury of Scripture Knowledge

Summary

But it shall be, when evening cometh on, he shall wash himself with water: and when the sun is down, he shall come into the camp again.

Bible References

Wash himself

Matthew 3:11
I immerse you in water, in order to repentance; but he that comes after me is mightier than I, whose sandals I am not worthy to carry. He will immerse you in the Holy Spirit and in fire:
Luke 11:38
And when the Pharisee saw it, he wondered that he had not first immersed himself before dinner.
Ephesians 5:26
that he might sanctify it, having cleansed it by the bath of water through the word,
Hebrews 9:9
which, as a symbol, remains to the present time, in which are offered both gifts and sacrifices that can not make perfect, as it respects the conscience, him that does the service;
Hebrews 10:22
let us draw near with a true heart, in full assurance of faith, having; our hearts sprinkled from an evil conscience, and our bodies washed with pure water;
1 Peter 3:21
the likeness of which, even immersion, (not the putting away of the filth of the flesh, but the seeking of a good conscience toward God,) does now also save us, through the resurrection of Jesus Christ,
Revelation 1:5
and from Jesus Christ, who is the faithful witness, the first born from the dead, and the Prince of the kings of the earth. To him that loves us, and that has washed us from our sins in his own blood,