in Dryden's satire of Absalom and Achitophel, is designed for Sancroft, Archbishop of Canterbury.
Zadoc the priest, whom (shunning power and place), His lowly mind advanced to David's [Charles II.] grace.
Part i. lines 801-2.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Zadoc from Infoplease: