41 Those who accepted his message were baptized, and about three thousand were added to their number that day.

Read Acts 2:41 Using Other Translations

Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls.
So those who received his word were baptized, and there were added that day about three thousand souls.
Those who believed what Peter said were baptized and added to the church that day—about 3,000 in all.