χαλκέων
From LSJ
μηδένα πρὸ τοῦ τέλους μακάριζε → call no man happy until he dies, call no man happy till he dies, it ain't over till the fat lady sings, the opera ain't over till the fat lady sings, count no man happy until he is dead, it's not over till it's over, count no man blessed before his end
