'Certain' in the Bible

The descendants of Benjamin rallied after Abner, and they became as one fighting group and stood on the top of a certain hill.

So Yahweh sent Nathan to David, and he came to him and said, "Two men were in a certain city; one [was] rich and the other [was] poor.

When a certain man saw [it], he told Joab, and he said, "Look, I saw Absalom hanging in the oak tree!"