What did Lincoln claim that men in the South used to wiring their bread from

The correct answer is that Lincoln claimed that men in the South used to "wring their bread" from the sweat of other men's faces.

In Lincoln 2nd inaugural speech he stated that men in the South as well as the North, have been taking advantage of slaves. That is to say, that both have been guilty of making money and food using inhumane slave work. Therefore, both Northern and Southern people share the blame for the war and were getting their bread out of slavery.