Damon and Pythias
In a Greek legend, two friends who were enormously loyal to each other. When the tyrannical ruler of their city condemned Pythias to death, Pythias pleaded for time to go home and put his affairs in order. Damon agreed to stay and die in place of Pythias if Pythias did not return by the time of the execution. Pythias was delayed, and Damon prepared to be executed. Pythias arrived just in time to save Damon. The ruler was so impressed by their friendship that he let them both live.
Note: Damon and Pythias symbolize devotion between friends.