The chariot of Israel and the horsemen thereof - These difficult words are probably said of Elijah, whom Elisha addresses as “the true defense of Israel, better than either the chariots or horsemen” which he saw. Hence, his rending his clothes in token of his grief.
Related Commentaries of 2 Kings 2:12
2 Kings 2:12
12 And Elisha saw it, and he cried, My father, my father, the chariot of Israel, and the horsemen thereof. And he saw him no more: and he took hold of his own clothes, and rent them in two pieces.