"And now the matchless deed's atchiev'd, | DETERMINED, DARED, AND DONE."

National Portrait Gallery 3780

     Christopher Smart (1722-1771), "A song to David" (1763), stanza 86, and also the concluding stanza to "We sing of God, the mighty source".  On p. 147 of vol. 2 of the Clarendon Poetical works.