Adam Clarke on 2 Kings 2:12

The chariot of Israel and the horsemen thereof - The Chaldee translates these words thus: "My master, my master! who, by thy intercession, wast of more use to Israel than horses and chariots." This is probably the sense.

In the Book of Ecclesiasticus 48:1, etc., the fiery horses and chariot are considered as an emblem of that burning zeal which Elijah manifested in the whole of his ministry: "Then stood up Elijah the prophet as fire, and his word burned as a lamp," etc.

And rent them in two pieces - As a sign of sorrow for having lost so good and glorious a master.