That's why David killed everyone in the towns he attacked. He thought, “If I let any of them live, they might come to Gath and tell what I've really been doing.” David made these raids all the time he was in Philistia.
when 80 men came down the road toward Mizpah from the towns of Shechem, Shiloh, and Samaria. They were on their way to the temple to offer gifts of grain and incense to the Lord. They had shaved off their beards, torn their clothes, and cut themselves, because they were mourning.