See epsilon 695 for the use of gambling with the 6-sided dice (cubes, see kappa 2601) as a metaphor for risk-taking, especially in battle, and for references to the use in battle of the proverbs "The die is cast" (epsilon 3013, etc.) and "Triple six or just three dice" (eta 635, etc.).
The second sentence here is obviously not a definition of the headword but an example (Polybius fr.6 B-W) of its use in language.