What does 2 Samuel 19:7 mean?

'Now get up, go out there, and encourage your men. If you don’t, I swear by God, not a single one of them will stay with you tonight. That would be worse for you than anything you’ve faced since you were young.' 2 Samuel 19:7 - Modern Text Bible

(Joab warns David that if he doesn’t show appreciation to his troops, he’ll lose their loyalty, and things will get even worse for him.)