What does 1 Samuel 25:7 mean?

I've heard you're having your sheep sheared. When your shepherds were with us, we didn't bother them, and nothing of theirs went missing the whole time they were in Carmel. 1 Samuel 25:7 - Modern Text Bible

(David reminds Nabal that his men protected Nabal's shepherds and property, hinting that he deserves some kindness in return.)