But about midnight Paul and Silas were praying and singing hymns unto God, and the prisoners were listening to them; and suddenly there was a great earthquake, so that the foundations of the prison-house were shaken: and immediately all the doors were opened, and every one's bands were loosed. And the jailor, being roused out of sleep and seeing the prison doors open, drew his sword and was about to kill himself, supposing that the prisoners had escaped. But Paul cried with a loud voice, saying, Do thyself no harm: for we are all here. And he called for lights and sprang in, and, trembling for fear, fell down before Paul and Silas, and brought them out and said, Sirs, what must I do to be saved? And they said, Believe on the Lord Jesus, and thou shalt be saved, thou and thy house. And they spake the word of the Lord unto him, with all that were in his house. And he took them the same hour of the night, and washed their stripes; and was baptized, he and all his, immediately. And he brought them up into his house, and set food before them, and rejoiced greatly, with all his house, having believed in God.
... if thou shalt confess with thy mouth Jesus as Lord, and shalt believe in thy heart that God raised him from the dead, thou shalt be saved.... Whosoever shall call upon the name of the Lord shall be saved. How then shall they call on him in whom they have not believed? and how shall they believe in him whom they have not heard? and how shall they hear without a preacher? and how shall they preach, except they be sent?
But as many as received him, to them gave he the right to become children of God, even to them that believe on his name: who were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.
He that hath the Son hath the life; he that hath not the Son of God hath not the life. These things have I written unto you, that ye may know that ye have eternal life, even unto you that believe on the name of the Son of God.
(1 John 5:12-13)
For as many as are led by the Spirit of God, these are sons of God. For ye received not the spirit of bondage again unto fear; but ye received the spirit of adoption, whereby we cry, Abba, Father. The Spirit himself beareth witness with our spirit, that we are children of God: and if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified with him.
... not by works done in righteousness, which we did ourselves, but according to his mercy he saved us, through the washing of regeneration and renewing of the Holy Spirit,
For while we were yet weak, in due season Christ died for the ungodly. For scarcely for a righteous man will one die: for peradventure for the good man some one would even dare to die. But God commendeth his own love toward us, in that, while we were yet sinners, Christ died for us.
And in none other is there salvation: for neither is there any other name under heaven, that is given among men, wherein we must be saved.