Herakles and Antaios. Wikipedia on the latter: Antaeus (Ἀνταίος) in Greek and Berber mythology was a half-giant, the son of Poseidon and Gaia, whose wife was Tinjis. And: He was indefatigably strong as long as he remained in contact with the ground (his mother earth), but once lifted into the air he became as weak as other men. Heracles, finding that he could not beat Antaeus by throwing him to the ground as he would regain his strength and be fortified, discovered the secret of his power and, holding Antaeus aloft, crushed him in a bearhug. The story of Antaeus has been used as a symbol of the spiritual strength which accrues when one rests one's faith on the immediate fact of things. The struggle between Antaeus and Heracles is a favorite subject in ancient and Renaissance sculpture.