so he] Elijah.
plowing with twelve] In the company of other persons that were there plowing, and Elisha the last of them; who, of a plow-man, is made a prophet, as Amos 7:14. Matthew 4:18.
mantle] His upper coat (v. 13.) whereby he was known to be a prophet, 2 Kings 1:8. Zechariah 13:4.
upon him] As a signe of his calling to be a prophet.