And Ham, the father of Canaan, saw the nakedness of his father, and told his two brethren outside.
All Commentaries on Genesis 9:22 Go To Genesis 9
Augustine of Hippo
AD 430
When subjection came, it was merely a condition deservedly imposed on sinful man. So, in Scripture, there is no mention of the word slave until holy Noah used it in connection with the curse on his son’s wrongdoing.