Matthew 3:11

I indeed baptize you with water to lead you to repentance; but he that cometh after me, is my superiour, whose shoes I am not worthy to carry: he shall baptize you with the effusion of the holy Ghost, in the appearance of fire:

Luke 11:38-39

but the Pharisee was surprized to see that he did not wash before dinner.

Ephesians 5:26-27

to sanctify and purify her by the ablution of his word,

Hebrews 9:9-10

This type subsists to the present time, both gifts and sacrifices being still offered, which cannot purify the mind of him that officiates

Hebrews 10:22

let us draw near with sincerity, in full assurance of faith, having our consciences purified from guilt, and our bodies washed with pure water.

1 Peter 3:21

thus baptism, which corresponds to the deluge, does now save us, not as it is a cleansing from external filth, but as it is an engagement to lead a divine life, from the belief of the resurrection of Jesus Christ,

Revelation 1:5

and from Jesus Christ, who is the faithful witness, the first-born of the dead, and the prince of the kings of the earth: unto him that loved us, and washed us from our sins by 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 indeed baptize you with water to lead you to repentance; but he that cometh after me, is my superiour, whose shoes I am not worthy to carry: he shall baptize you with the effusion of the holy Ghost, in the appearance of fire:
Luke 11:38
but the Pharisee was surprized to see that he did not wash before dinner.
Ephesians 5:26
to sanctify and purify her by the ablution of his word,
Hebrews 9:9
This type subsists to the present time, both gifts and sacrifices being still offered, which cannot purify the mind of him that officiates
Hebrews 10:22
let us draw near with sincerity, in full assurance of faith, having our consciences purified from guilt, and our bodies washed with pure water.
1 Peter 3:21
thus baptism, which corresponds to the deluge, does now save us, not as it is a cleansing from external filth, but as it is an engagement to lead a divine life, from the belief of the resurrection of Jesus Christ,
Revelation 1:5
and from Jesus Christ, who is the faithful witness, the first-born of the dead, and the prince of the kings of the earth: unto him that loved us, and washed us from our sins by his own blood,