2 1 Of these ancestors of Lycurgus, Soüs was most famous, under whom the Spartans made the Helots their slaves, and acquired by conquest from the Arcadians a large additional tract of land. It is also related of this Soüs that when he was besieged by the Cleitorians in a rough and waterless place, he agreed to surrender to them the land which he had conquered if he himself and all his men with him should drink from the adjacent spring. 2 After the oaths to this agreement were taken, he assembled his men and offered his kingdom to the one who should not drink; no one of them, however, could forbear, but all of them drank, whereupon Soüs himself went down last of all to the water, sprinkled his face merely, while the enemy were still at hand to see, and then marched away and retained his territory, on the plea that all had not drunk. https://penelope.uchicago.edu/Thayer/E/Roman/Texts/Plutarch/Lives/Lycurgus*.html#ref3 Source: Plutarchus' Life of Lycurgus in Parallell lives
Okay, that is funny. Imagine him being like: you will get my kingdom if you can bear not quenching your thirst! And the soldiers likely well knowing he will still be regarded king if one agrees go collectively 'nah' and go drinking and he is forced to only sprinkle his face and then march away, under the eyes of the Cleitorians who must have felt unfairly fooled.