Come back with your shield or on it.
This is what Spartan wives used to say to their sons and husbands when they went to war.
In the phalanx formation the shield was used to protect the guy to your tight. In training, they never were too far from their shield. If you ever lost your shield, your effectiveness as a soldier was about zero.
So if you showed up home without your shield, well you have some explaining to do.
The other half of the saying is obvious. The dead were carried home on their shields.