What does 2 Samuel 16:4 mean?

The king said to Ziba, 'Everything that belonged to Mephibosheth is now yours.' Ziba said, 'Thank you, my king. I hope I always find favor with you.' 2 Samuel 16:4 - Modern Text Bible

(David, believing Ziba's story, gives him all of Mephibosheth's property. Ziba is grateful, but his motives are questionable.)