John Gill Commentary Ezekiel 23:6

"who were clothed with blue, governors and rulers, all of them desirable young men, horsemen riding upon horses." — Ezekiel 23:6 (ASV)

Which were clothed with blue A colour the Assyrians were fond of, and clothed their soldiers in, and was taking to the eye; and is mentioned, because that men, finely clothed find beautifully arrayed, are more engaging to women, who are fond of dress:

captains and rulers ; men of power and authority in military and civil affairs, either in the camp, or in the court; officers either in the army, or in the king's palace; and which was a recommendation of them:

desirable young men ; for their youth, strength, beauty, and honourable employments and offices:

horsemen riding upon horses : of which there was a scarcity in Judea; wherefore such were the more desirable to them, as appearing more grand, and being more serviceable and helpful to them.