'Something' in the Bible

“When someone sins in any of these ways: If he has seen, heard, or known about something he has witnessed, and did not respond to a public call to testify, he is responsible for his sin.

or finds something lost and lies about it; or swears falsely about any of the sinful things a person may do—

the owner of the house is to come and tell the priest: Something like mildew contamination has appeared in my house.

to determine when something is unclean or clean. This is the law regarding skin disease and mildew.”