“The messengers came again, and said. ‘Thus says King Ben-hadad. I sent to you, saying, deliver to me your silver and your gold, your wives and your children. Nevertheless I will send my servants to you tomorrow about this time. They shall search your house and the houses of your servants. They shall lay hands on whatever pleases them, and take it away.’”
The second request of King Ben-hadad said that he was going to send men to search and take anything that they wanted. This only seems logical from the first request since King Ahab had agreed to the first request.