Difference between Baptism and Jewish washings

The difference is that one is a one-time, faith-working act on God’s part (Baptism), while the other speaks of ritualistic, ceremonial purifications that people perform (Jewish tevilah).

Baptism joins people to Jesus in faith and gives them the blessings he won by his holy life, sacrificial death and glorious resurrection (Romans 6:3; Galatians 3:27). In Baptism God offers and gives people the forgiveness of sins (Acts 2:38; 22:16). Jewish ritual washings did not have those purposes; they were ceremonial washings only.