“People crushed by law have no hopes but from power. If laws are their enemies, they will be enemies to laws.”
According to Kenneth Owen Morgan (The Illustrated History of Britain (1984) p. 421) this was said by Macaulay in 1832. If so, he was quoting a letter written by Edmund Burke in 1777.
Attributed
Help us to complete the source, original and additional information
Thomas Babington Macaulay, 1st Baron Macaulay 101
British historian and Whig politician 1800–1859Related quotes

Source: Writings, The Institutes of Biblical Law (1973), p. 93

as quoted in The Works of the Honourable James Wilson (Philadelphia: Bronson and Chauncey, 1804), Vol. I, pp. 106 & 103-105.
"Postscript", p. 153.
The Anarchist Cookbook (1971)

Speech in the House of Commons (3 February 1808) on the British bombardment of Copenhagen, quoted in George Henry Francis, Opinions and Policy of the Right Honourable Viscount Palmerston, G.C.B., M.P., &c. as Minister, Diplomatist, and Statesman, During More Than Forty Years of Public Life (London: Colburn and Co., 1852), pp. 1-3.
1800s

Published in "Minor Literature: Case Study: the Red Army Faction" http://www.simonosullivan.net/articles/red-army-faction.pdf