When I was in Highschool, a teacher told my class that the word reneging was used when a slave owner would sell a slave, the slave would run home, and then the owner would resell that slave again.  I had recently brought this up in one of my college courses and my teacher called me a liar in front of the whole class.  I need some proof that this word was used in this context to prove it to my teacher because every time I am in class, the teacher brings it up.  Please help!
Tags: historical, Meanings, reneging, word