1 Samuel 26:25

Then Saul said to David, Blessed be thou, my son David, still speaking under the influence of the fleeting better feeling which David's noble conduct awakened in him; thou shalt both do great things, and also shalt still prevail, both undertake and also fully perform, for Saul could not shut his eyes to the fact that the blessing of Jehovah was resting upon David. So David went on his way, not accepting Saul's invitation to return with him, and Saul returned to his place. Thus these two men parted forever, for Saul's enmity continued and forced David to flee into heathen territory. When a person has so hardened his heart that all kindness leaves no lasting impression, his final condemnation is only a matter of time.