And he sent Eliakim... — See the Note on 2 Kings 3:12; and comp. 2 Kings 13:14; 2 Kings 22:14; Jeremiah 37:3. Knobel (on Isaiah) remarks that this distinguished embassy speaks for the high estimation in which the prophet stood.
The elders of the priests — i.e., the heads of the sacerdotal caste (próceres, not senes).