Remarks to Rump Parliament, 20 Apr. 1653. The Oxford Dictionary of Quotations describes this as "oral tradition." BulstrodeWhitlocke, Memorials of the English Affairs (1682), describes Cromwell as telling the House that "they has sate long enough, unles they had done more good."
Anna Julia Cooper, Charles C. Lemert, Esme Bhan (1998). “The Voice of Anna Julia Cooper: Including A Voice from the South and Other Important Essays, Papers, and Letters”, p.76, Rowman & Littlefield