LAWRENCE: (calling after him) Sherif Ali, so long as the Arabs fight tribe against tribe, so long will they be a little people. A silly people! Greedy, barbarous, and cruel — as you are!

Robert Bolt (1924-1995) English dramatist

Lawrence of Arabia, sc. 106 (1962) [with Michael Wilson]
    (Source)

After Sherif Ali has killed the Arab guide Lawrence was using for being of the wrong tribe to use one of the Harith tribe's wells.