2 Kings 9:13

Overview - 2 Kings 9
Elisha sends a young prophet with instructions to anoint Jehu at Ramoth-gilead.
The prophet having done his message, flees.
11 Jehu, being made king by the soldiers, kills Joram in the field of Naboth.
27 Ahaziah is slain at Gur, and buried at Jerusalem.
30 Proud Jezebel is thrown down out of a window, and eaten by dogs.
Treasury of Scripture Knowledge

2 Kings 9:13  (King James Version)
Then they hasted, and took every man his garment, and put it under him on the top of the stairs, and blew with trumpets, saying, Jehu is king.

and took every
The spreading of garments in the street, before persons to whom it was intended to shew particular honour, was an ancient and very general custom; the garments in these cases being used for carpets. In the Agamemnon of schylus, the hypocritical Clytemnestra commands the maids to spread carpets before her returning husband, that on his descending from his chariot he may place his foot on "a purple-covered path." We also find this custom among the Romans. Plutarch relates, that when Cato of Utica left the Macedonian army, where he had become legionary tribune, the soldiers spread their clothes in the way.
Matthew 21:7 Matthew 21:8 ; Mark 11:7 Mark 11:8

on the top
The ancient fortified cities were generally strengthened with a citadel, ( Judges 9:46 ,51,) commonly built on an eminence, to which they ascended by a flight of stairs, ( Nehemiah 3:15 .) It is extremely probable, therefore, that Ramoth-gilead, being a frontier town of Israel and Syria, had a tower of this nature; and that Jehu was proclaimed king on the top of the stairs by which they ascended the hill on which the tower stood, i
e., in the area before the door of the tower, and consequently the most public place in the city.

blew with trumpets
2 Samuel 15:10 ; 1 Kings 1:34 1 Kings 1:39 ; Psalms 47:5-7 ; 98:6

is king
Hebrew reigneth.