(Devarim 25:11) "If men strive together": Peace does not proceed from strife, as it is written (Bereshith 13:7) "And there was a quarrel between the herdsmen of Avram's cattle and the herdsmen of Lot's cattle." What is it that caused Lot to part from Avram? A quarrel. And thus is it written (Ibid. 1) "If there be a quarrel among men, etc." What caused this one to receive stripes (viz. Ibid. 2)? A quarrel.