The Iliad by Homer Book 2 Page 22

Saturn surely promised that we should succeed, when we Argives set sail to bring death and destruction upon the Trojans.

He showed us favourable signs by flashing his lightning on our right hands; therefore let none make haste to go till he has first lain with the wife of some Trojan, and avenged the toil and sorrow that he has suffered for the sake of Helen. Nevertheless, if any man is in such haste to be at home again, let him lay his hand to his ship that he may meet his doom in the sight of all. But, O king, consider and give ear to my counsel, for the word that I say may not be neglected lightly. Divide your men, Agamemnon, into their several tribes and clans, that clans and tribes may stand by and help one another. If you do this, and if the Achaeans obey you, you will find out who, both chiefs and peoples, are