If you run after two hares you will catch neither proverbial saying, early 16th century, meaning that one must decide on one's goal.
a run for one's money a satisfactory period of success in return for one's exertions or expenditure; originally from racing, and recorded from the late 19th century.
run the gauntlet undergo the military punishment of receiving blows while running between two rows of men with sticks; alteration (in the mid 17th century) of gantlope (from Swedish gatlopp, from gata ‘lane’ + lopp ‘course’) by association with gauntlet.
you cannot run with the hare and hunt with the hounds proverbial saying, mid 15th century, meaning that you must take one of two opposing sides.
Subjects: Warfare and Defence.