In Acts 2:38 Peter gives instruction to exactly whom ? He gives it to them that have been pricked in their heart Acts 2:37-38 37 Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do? 38 Then Peter said unto them[That were pricked in their heart], Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost. And this pricking is a Spiritual pricking, not mere natural conscience, but Spiritual and inward and done by the Holy Spirit who Christ had so recently poured or shed upon them Acts 2:32-33 32 This Jesus hath God raised up, whereof we all are witnesses. 33 Therefore being by the right hand of God exalted, and having received of the Father the promise of the Holy Ghost, he hath shed forth this, which ye now see and hear. See also in this connection Titus 3:6 ! Peter here was able to realize that the ones seeking instruction from them, had been given the Gift of Repentance Acts 5:31 31 Him hath God exalted with his right hand to be a Prince and a Saviour, for to give repentance to Israel, and forgiveness of sins. Note, As Exalted Saviour Jesus Christ gives Repentance to the Elect !