Jesus, Peter, Paul, and all the apostles taught that Temple sacrifices, that were meant to atone for sins, were no longer necessary. They all taught everyone must repent of sin, be baptized in water, and follow the teaching of Christ. They all taught the same thing.
Acts 2:37 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, Repent, and be baptized [in water] every one of you in the name of Jesus Christ for the remission of sins, and you shall receive the gift of the Holy Ghost.
Acts 2:41 Then they that gladly received his word were baptized [in water]: and the same day there were added unto them about three thousand souls. 42 And they continued steadfastly in the apostles' doctrine and fellowship, and in breaking of bread, and in prayers.
Acts 5:42 And daily in the temple, and in every house, they ceased not to teach and preach Jesus Christ.
Acts 20:20 And how I kept back nothing that was profitable unto you, but have shewed you, and have taught you publicly, and from house to house, 21 Testifying both to the Jews, and also to the Greeks, repentance toward God, and faith toward our Lord Jesus Christ.
Acts 22:16 [Ananias tells Paul] And now why tarry thou? arise, and be baptized [in water], and wash away thy sins,
1 Corinthians 1:14 I thank God that I baptized none of you, but Crispus and Gaius; 15 Lest any should say that I had baptized in mine own name. 16 And I baptized also the household of Stephanas: besides, I know not whether I baptized any other.
--Dave