'Permission' in the Bible

While in Egypt Hadad heard that David had passed away and that Joab, the commander of the army, was dead. So Hadad asked Pharaoh, "Give me permission to leave so I can return to my homeland."

Pharaoh said to him, "What do you lack here that makes you want to go to your homeland?" Hadad replied, "Nothing, but please give me permission to leave."