Odyssey 18.130–131
Odysseus, disguised as a beggar, to Amphinomus
οὐδὲν ἀκιδνότερον γαῖα τρέφει ἀνθρώποιο,
πάντων ὅσσα τε γαῖαν ἔπι πνείει τε καὶ ἕρπει.
The earth nourishes nothing frailer than a human being
among all the creatures that breathe and crawl upon it.