Joab had defected to Adonijah, though he had not defected to Absalom —1 Kings 2:28
Joab withstood the greatest test of his life, remaining absolutely loyal to David by not turning to follow after the fascinating and ambitious Absalom. Yet toward the end of his life he turned to follow after the weak and cowardly Adonijah. Always remain alert to the fact that where one person has turned back is exactly where anyone may be tempted to turn back (see 1 Corinthians 10:11-13). You may have just victoriously gone through a great crisis, but now be alert about the things that may appear to be the least likely to tempt you. Beware of thinking that the areas of your life where you have experienced victory in the past are now the least likely to cause you to stumble and fall.