"Then Peter said unto them, Repent and be baptized every one of you in the name of Jesus Christ for the remission of sins; and ye shall receive the Holy Ghost." - Acts 2:38
The following sermons are on Acts 2:38:
Repentance Evangelism, by Rev. Ian Goligher
Pentacostalism - It's Assurance, by James Hamilton, The Street Preacher
Repentance, Remission, and Power, by Rev. Graeme Craig