1 Samuel 20:26

And Saul did not speak anything that day. For he thought, Something has happened to him; he is not clean. Surely he is not clean.

Leviticus 15:5

And whoever touches his bed shall wash his clothes and bathe in water, and be unclean until the evening.

Leviticus 11:24

And you shall be unclean for these. Whoever touches their dead body shall be unclean until the evening.

Leviticus 11:27

And whatever goes on its paws, among all the living things that go on all four, those are unclean to you. Whoever touches their dead body shall be unclean until the evening.

Leviticus 7:20-21

But the soul that eats of the flesh of the sacrifice of peace offerings that pertain to Jehovah, having his uncleanness on him, even that soul shall be cut off from his people.

Leviticus 11:31

These are unclean to you among all that swarm. Whoever touches them when they are dead shall be unclean until the evening.

Leviticus 11:40

And he that eats of its dead body shall wash his clothes and be unclean until the evening. He also that carries its body shall wash his clothes and be unclean until the evening.

Leviticus 15:16-17

And if any man's semen goes from him, then he shall wash all his flesh in water and be unclean until the evening.

Leviticus 15:19-21

And if a woman has an issue, and her issue in her flesh is blood, she shall be in her impurity seven days. And whoever touches her shall be unclean until the evening.

Numbers 19:16

And whoever touches one that is killed with a sword in the open fields, or a dead body, or a bone of a man, or a grave, shall be unclean seven days.

1 Samuel 16:5

And he said, Peaceably. I have come to sacrifice to Jehovah. Sanctify yourselves and come with me to the sacrifice. And he sanctified Jesse and his sons, and called them to the sacrifice.

Treasury of Scripture Knowledge

Summary

Nevertheless Saul spake not any thing that day: for he thought, Something hath befallen him, he is not clean; surely he is not clean.

Bible References

He is not clean

Leviticus 7:21
And the soul that shall touch any unclean thing, of the uncleanness of man, or any unclean animal, or an unclean abominable thing, and eat of the flesh of the sacrifice of peace offerings which pertain to Jehovah, even that soul shall be cut off from his people.
Leviticus 11:24
And you shall be unclean for these. Whoever touches their dead body shall be unclean until the evening.
Leviticus 15:5
And whoever touches his bed shall wash his clothes and bathe in water, and be unclean until the evening.
Numbers 19:16
And whoever touches one that is killed with a sword in the open fields, or a dead body, or a bone of a man, or a grave, shall be unclean seven days.