Acts of the Apostles 2: 38-41

38 Peter [said] to them, “Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins; and you will receive the gift of the holy Spirit.
39 For the promise is made to you and to your children and to all those far off, whomever the Lord our God will call.”
40 He testified with many other arguments, and was exhorting them, “Save yourselves from this corrupt generation.”
41 Those who accepted his message were baptized, and about three thousand persons were added that day.

https://www.flickr.com/photos/110795613@N07/31842369467

attribution: Church Iglesia and flickr

https://creativecommons.org/licenses/by/2.0/