That is a false Gospel. Believe on the Lord Jesus Christ and thou shalt be saved is the true Gospel. And it is this obedience of faith that grants the gift of the Holy Spirit.
BTW is you fail to obey a single commandment, you have failed altogether!
BTW is you fail to obey a single commandment, you have failed altogether!
Peter was the first to present the gospel after receiving the Holy Ghost on the Day of Pentecost. There is no doubt when the 3000 listeners were added to the body of Christ. It was AFTER they heard and obeyed the instructions Peter gave as recorded in the scripture included below. Believing in the Lord Jesus Christ is far more than a mental exercise. If that were true, Peter would have responded to the question, "What shall we do?" by saying, Nothing! You believe in Jesus, you are good to go. He did not.
Upon rightly dividing the word it becomes clear that obedience to the NT commands bring about one's spiritual rebirth. (John 3:3-5, and Mark 16:15-16) Repentance and being water baptized in the name of the Lord Jesus for remission of sin are steps of faith the believer takes in association with Jesus sacrifice. They have nothing to do with the OT law.
"Therefore let all the house of Israel know assuredly, that God hath made the same Jesus, whom ye have crucified, both Lord and Christ.
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?
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 gift of the Holy Ghost.
For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call.
And with many other words did he testify and exhort, saying, Save yourselves from this untoward generation.
Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls.
And they continued stedfastly in the apostles' doctrine." Acts 2:35-42