Many of the horses belonging to the Israelites had died because of the famine. The meaning of this can be made clear. AT: "the horses in the city that are still alive" (See: [[rc://en/ta/man/translate/figs-explicit]])
The men that would go to the Aramean camp would share the same fate as the rest of the Israelites who remained in the city. They would either die from starvation, or possibly be killed by the Arameans.
The implicit information about what he wanted to see may be expressed clearly. AT: "see if what these lepers have said is true" (See: [[rc://en/ta/man/translate/figs-explicit]])