2 Kings 19:36 - Joseph Benson’s Commentary on the Old and New Testaments

So Sennacherib departed Ashamed to see himself, after all his proud boasts, thus defeated, and disabled to pursue his conquests, or even to secure what he had gained, the flower of his army being cut off; nay, and continually afraid of falling under the like stroke himself. The manner of the expression, He departed, and went, and returned, intimates the great disorder and distraction of mind he was in.