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(Menelaos:) ‘[…] and sitting well in order we dashed the oars in the gray sea, back to where Egypt is, the sky-fallen river, and there I stranded my ships, and there I rendered complete hecatombs. But when I had ended the anger of the gods, who are everlasting, I piled a mound for Agamemnon, so that his memory might never die. I did this, and set sail, and the immortals gave me a wind, so brought me back to my own dear country with all speed.’ (4.580-587)
Proper burial rites are a big deal in this culture, as we see over and over in the Odyssey. A man is only honored in death when he is properly respected by those still living.
(Athene, disguised as Iphthime:) 'As for that other one, I will not tell you the whole story whether he lives or has died. It is bad to babble emptily.' (4.836-837)
Here's another principle that is just as good in the 21st century as it was in ancient Greece: don't run off at the mouth.