E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Hushai (2 syl.),
in Drydens satire of Absalom and Achitophel, is Hyde, Earl of Rochester. Hushai was Davids friend, who counteracted the counsels of Achitophel, and caused the plot of Absalom to miscarry; so Rochester defeated the schemes of Shaftesbury, and brought to nought the rebellion of the Duke of Monmouth.
N.B. This was not John Wilmot, Earl of Rochester, the wit.