Here's the English version with historical sources on the etymology of "slave" from "Slav":

### The Document That Banned Enslavement of Slavs (Including Poles)

The key document prohibiting the enslavement of Christian Slavs (including Poles) was **Pope Eugene IV's bull *Sicut Dudum* (1435), which primarily addressed the Canary Islands but set an important precedent. However, Poland's baptism in 966 AD placed Poles under the protection of Christian canon law, which had beenPokaż całość