1 Samuel 20:26

Nevertheless, yet Saul said nothing at all that day. For he thought, 'Something has chanced him that he is not clean.'

Leviticus 15:5

He that toucheth his couch, shall wash his clothes and bathe himself with water, and be unclean until the even.

Leviticus 11:24

In such ye shall be unclean: whosoever touch the carcass of them shall be unclean unto the even,

Leviticus 11:27

And all that goeth upon his hands among all manner beasts that go on all fours, are unclean unto you: and as many as touch their carcasses, shall be unclean until the evening.

Leviticus 7:20-21

If any soul eat of the flesh of the peace offerings, that pertain unto the LORD, and his uncleanness yet upon him, the same soul shall perish from among his people.

Leviticus 11:31

These are unclean to you among all that move, and all that touch them when they be dead, shall be unclean until the evening.

Leviticus 11:40

And he that eateth of any such dead carcass, shall wash his clothes and remain unclean until the evening. And he also that beareth the carcass of it, shall wash his clothes and be unclean until even.

Leviticus 15:16-17

"'If any man's seed depart from him in his sleep, he shall wash his flesh in water and be unclean until evening.

Leviticus 15:19-21

When a woman's natural course of blood runneth, she shall be put apart seven days: and whosoever toucheth her shall be unclean unto the evening.

Numbers 19:16

And whosoever toucheth one that is slain with a sword in the fields, or a dead person, or a bone of a dead man, or a grave: shall be unclean seven days.

1 Samuel 16:5

And he said "Yea, for I am come to offer unto the LORD. Cleanse yourselves and come with me to the offering." And he purified Jesse and his sons, and bade them to the offering.

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
Moreover if a soul touch any unclean thing, whether it be the uncleanness of man or of any unclean beast or any abomination that is unclean: and then eat of the flesh of the peace offerings which pertain unto the LORD, that soul shall perish from his people.'"
Leviticus 11:24
In such ye shall be unclean: whosoever touch the carcass of them shall be unclean unto the even,
Leviticus 15:5
He that toucheth his couch, shall wash his clothes and bathe himself with water, and be unclean until the even.
Numbers 19:16
And whosoever toucheth one that is slain with a sword in the fields, or a dead person, or a bone of a dead man, or a grave: shall be unclean seven days.