God saw their works, that they turned from their evil way. God repented of the evil which he said he would do to them, and he didn't do it.
 “As God is unchangeable in nature, so is He unchangeable in will. For no one can turn back His thoughts. For though some seem to have turned back His thoughts by their deprecations, yet this was His inward thought, that they should be able by their deprecations to turn back His sentence, and that they should receive from Him whereby to avail with Him. When then outwardly His sentence seemeth to be changed, inwardly His counsel is unchanged, because He inwardly ordereth each thing unchangeably, whatsoever is done outwardly with change.” “It is said that He repented, because He changed that which He seemed about to do, to destroy them. In God all things are disposed and fixed, nor doth He anything out of any sudden counsel, which He knew not in all eternity that He should do; but, amid the movements of His creature in time, which He governeth marvelously, He, not moved in time, as by a sudden will, is said to do what He disposed by well-ordered causes in the immutability of His most secret counsel whereby things which come to knowledge, each in its time, He both doth when they are present, and already did when they were future.” “God is subject to no dolor of repentance, nor is He deceived in anything, so as to wish to correct wherein He erred. But as man, when he repenteth willeth to change what he has done, so when thou hearest that God repenteth, look for the change. God, although He calleth it ‘repenting,’ doth it otherwise than thou. Thou doest it, because thou hast erred; He, because He avengeth or freeth. He changed the kingdom of Saul when He “repented.”