He said to the people, "Let's build walls and defense towers for these towns, and put in gates that can be locked with bars. This land still belongs to us, because we have obeyed the LORD our God. He has given us peace from all our enemies." The people did everything Asa had suggested.
During his rule he attacked and defeated the Ammonites. Then every year for the next three years, he forced them to pay four tons of silver, sixty thousand bushels of wheat, and sixty thousand bushels of barley.