Acts 19:1-7And it came to pass, that, while Apollos was at Corinth, Paul having passed through the upper coasts came to Ephesus: and finding certain disciples, (2) He said unto them, Have ye received the Holy Ghost since ye believed? And they said unto him, We have not so much as heard whether there be any Holy Ghost. (3) And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism. (4) Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus. (5) When they heard this, they were baptized in the name of the Lord Jesus. (6) And when Paul had laid his hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied. (7) And all the men were about twelve.
Being baptised in water does not save anyone. We are saved by the faith of the Son of God. Yet, baptism is an integral part of the gospel.
Matthew 28:18-20 And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth. (19) Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: (20) Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.
Acts 2:37-41Now 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 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. (39) 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. (40) And with many other words did he testify and exhort, saying, Save yourselves from this untoward generation. (41) Then they that gladly received his word were baptized: and the same day there were added untothem about three thousand souls.
Mark 16:14-20 Afterward he appeared unto the eleven as they sat at meat, and upbraided them with their unbelief and hardness of heart, because they believed not them which had seen him after he was risen. (15) And he said unto them, Go ye into all the world, and preach the gospel to every creature. (16) He that believeth and is baptized shall be saved; but he that believeth not shall be damned. (17) And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues; (18) They shall take up serpents; and if they drink any deadly thing, it shall not hurt them; they shall lay hands on the sick, and they shall recover. (19) So then after the Lord had spoken unto them, he was received up into heaven, and sat on the right hand of God. (20) And they went forth, and preached every where, the Lord working with them, and confirming the word with signs following. Amen.
1 Peter 3:20-22 Which sometime were disobedient, when once the longsuffering of God waited in the days of Noah, while the ark was a preparing, wherein few, that is, eight souls were saved by water. (21) The like figure whereunto even baptism doth also now save us (not the putting away of the filth of the flesh, but the answer of a good conscience toward God,) by the resurrection of Jesus Christ: (22) Who is gone into heaven, and is on the right hand of God; angels and authorities and powers being made subject unto him.