What does 1 Samuel 20:29 mean?

He said, Please let me go, because our family is having a sacrifice in the town, and my brother told me to be there. If I’ve found favor with you, let me go see my family. That’s why he’s not at the king’s table. 1 Samuel 20:29 - Modern Text Bible

(Jonathan explains David’s absence as a family obligation, hoping to calm Saul.)