Acts 2:37-39 (NASB)

"Now when they heard this, they were pierced to the heart, and said to Peter and the rest of the apostles, 'Brethren, what shall we do?'
Peter said to them, 'Repent, and each of you be baptized in the name of Jesus Christ for the forgiveness of your sins; and you will receive the gift of the Holy Spirit. For the promise is for you and your children and for all who are far off, as many as the Lord our God will call to Himself.' "