in the satire of Absalom and Achitophel, by Dryden and Tate, is meant for Henry Bennet, Earl of Arlington. Eliab was one of the chiefs of the Gadites who joined David at Ziklag. (1 Chron. xii. 9.)
Hard the task to do Eliab right; Long with the royal wanderer [Charles II.] he roved, And firm in all the turns of fortune proved.
Absalom and Achitophel, part ii. 986-8.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894