When Silas and Timothy came from Macedonia, Paul devoted himself exclusively to preaching, testifying to the Jews that Jesus was the Christ. But when the Jews opposed Paul and became abusive, he shook out his clothes in protest and said to them, "Your blood be on your own heads! I am clear of my responsibility. From now on I will go to the Gentiles."
Then Paul left the synagogue and went next door to the house of Titius Justus, a worshiper of God. Crispus, the synagogue ruler, and his entire household believed in the Lord; and many of the Corinthians who heard him believed and were baptized.
Again, baptism comes after hearing the message and coming to faith in Christ.
Believing and baptism are so closely associated together in the New Testament that the two happened almost as a singular event.
Those that have been “baptized” as infants should take note that baptism in the Holy Scriptures only occurs after faith in Christ, not the other way around.
For more on infant baptism, click here.