And now are you cursed from the earth, which has opened its mouth to receive your brother's blood from your hand;
All Commentaries on Genesis 4:11 Go To Genesis 4
Ambrose of Milan
Like a slave, Cain received a mark and he could not escape death. Thus is the sinner a slave to fear, a slave to desire, a slave to greed, a slave to lust, a slave to sin, a slave to anger. Though such a man appears to himself free, he is more a slave than if he were under tyrants.