What was the Early Church's view on slavery?

Slavery exist in both the Old and the New Testament with God even regulating slavery in the Old Testament (Exodus 21:20-21, Deuteronomy 23:15) and St. Paul advocating for the freeing of slaves saying that Christians should receive them no longer as a slave but as a fellow brother in the Lord (Philemon 1:15-16), but **what was the Early Church Fathers view on slavery? (this can be from 50 AD to 900 AD)** > And if a man smite his servant, or his maid, with a rod, and he die > under his hand; he shall be surely punished. > > Notwithstanding, if he continue a day or two, he shall not be > punished: for he is his money. **Exodus 21:20-21** > Thou shalt not deliver unto his master the servant which is escaped > from his master unto thee: **Deuteronomy 23:15** > For perhaps he therefore departed for a season, that thou shouldest > receive him for ever; > > Not now as a servant, but above a servant, a brother beloved, > specially to me, but how much more unto thee, both in the flesh, and in the Lord? **Philemon 1:15-16**