hang his body on a tree: This was not the method of execution, at least in this text. It was a shameful display of those already put to death for severe crimes punishable by death. This was probably to show the Lord's hatred of sin. It also warned others about committing similar acts (see also Genesis 40:19, 22; Joshua 10:26; 2 Samuel 4:12; 21:12; Esther 2:23; 7:10).