le vin est tiré, il faut le boire

At the siege of Douai in 1667, Louis XIV. found himself unexpectedly under a heavy cannonade from the besieged city. In compliance with the entreaties of those around him, who urged him not to risk so important a life, he was about to retire in a somewhat unsoldierly and unkingly fashion, when M. de Charost rode up and whispered this proverb in his ear. The king remained exposed to the fire of the enemy for a suitable time, and held in higher honour the counsellor who had saved him from an unseemly retreat.—Trench. “Le vin est tiré, Monsieur, il faut le boire” is a line in Regnard’s Joueur, iii. 2.