Deuteronomy 23:11

But when evening comes near, let him take a bath: and after sundown he may come back to the tents.

Leviticus 14:9

And on the seventh day he is to have all the hair cut off his head and his chin and over his eyes--all his hair is to be cut off--and he will have his clothing washed and his body bathed in water and he will be clean.

Leviticus 15:5

And anyone touching his bed is to have his clothing washed and his body bathed in water and be unclean till evening.

Leviticus 11:25

Whoever takes away the dead body of one of them is to have his clothing washed, and will be unclean till evening.

Leviticus 15:11

And anyone on whom the unclean man puts his hands, without washing them in water, is to have his clothing washed and his body bathed in water and be unclean till evening.

Leviticus 15:13

And when a man who has a flow from his body is made clean from it, he is to take seven days to make himself clean, washing his clothing and bathing his body in flowing water, and then he will be clean.

Leviticus 15:17-23

And any clothing or skin on which the seed comes is to be washed with water and be unclean till evening.

Leviticus 22:6

Any person touching any such unclean thing will be unclean till evening, and may not take of the holy food till his flesh has been bathed in water;

Psalm 51:2

Let all my wrongdoing be washed away, and make me clean from evil.

Psalm 51:7

Make me free from sin with hyssop: let me be washed whiter than snow.

Ezekiel 36:25

And I will put clean water on you so that you may be clean: from all your unclean ways and from all your images I will make you clean.

Matthew 3:11

Truly, I give baptism with water to those of you whose hearts are changed; but he who comes after me is greater than I, whose shoes I am not good enough to take up: he will give you baptism with the Holy Spirit and with fire:

Luke 11:38-39

And when the Pharisee saw it, he was surprised because he came to the meal without first washing himself.

Ephesians 5:26-27

So that he might make it holy, having made it clean with the washing of water by the word,

Hebrews 9:9-10

And this is an image of the present time; when the offerings which are given are not able to make the heart of the worshipper completely clean,

Hebrews 10:22

Let us go in with true hearts, in certain faith, having our hearts made free from the sense of sin and our bodies washed with clean water:

1 Peter 3:21

And baptism, of which this is an image, now gives you salvation, not by washing clean the flesh, but by making you free from the sense of sin before God, through the coming again of Jesus Christ from the dead;

Revelation 1:5

And from Jesus Christ, the true witness, the first to come back from the dead, and the ruler of the kings of the earth. To him who had love for us and has made us clean from our sins by his 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.

General references

Bible References

When evening

Leviticus 11:25
Whoever takes away the dead body of one of them is to have his clothing washed, and will be unclean till evening.
Leviticus 15:17
And any clothing or skin on which the seed comes is to be washed with water and be unclean till evening.

Wash himself

Leviticus 14:9
And on the seventh day he is to have all the hair cut off his head and his chin and over his eyes--all his hair is to be cut off--and he will have his clothing washed and his body bathed in water and he will be clean.
Leviticus 15:5
And anyone touching his bed is to have his clothing washed and his body bathed in water and be unclean till evening.
Leviticus 22:6
Any person touching any such unclean thing will be unclean till evening, and may not take of the holy food till his flesh has been bathed in water;
Psalm 51:2
Let all my wrongdoing be washed away, and make me clean from evil.
Ezekiel 36:25
And I will put clean water on you so that you may be clean: from all your unclean ways and from all your images I will make you clean.
Matthew 3:11
Truly, I give baptism with water to those of you whose hearts are changed; but he who comes after me is greater than I, whose shoes I am not good enough to take up: he will give you baptism with the Holy Spirit and with fire:
Luke 11:38
And when the Pharisee saw it, he was surprised because he came to the meal without first washing himself.
Ephesians 5:26
So that he might make it holy, having made it clean with the washing of water by the word,
Hebrews 9:9
And this is an image of the present time; when the offerings which are given are not able to make the heart of the worshipper completely clean,
Hebrews 10:22
Let us go in with true hearts, in certain faith, having our hearts made free from the sense of sin and our bodies washed with clean water:
1 Peter 3:21
And baptism, of which this is an image, now gives you salvation, not by washing clean the flesh, but by making you free from the sense of sin before God, through the coming again of Jesus Christ from the dead;
Revelation 1:5
And from Jesus Christ, the true witness, the first to come back from the dead, and the ruler of the kings of the earth. To him who had love for us and has made us clean from our sins by his blood;

General references

Leviticus 15:16
And if a man's seed goes out from him, then all his body will have to be bathed in water and he will be unclean till evening.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain