This Jesus is the stone that was rejected by you, the builders, which has become the cornerstone.
And there is salvation in no one else, for there is no other name under heaven given among men by which we must be saved."

Acts 4:11-12 

Now I would remind you, brothers, of the gospel I preached to you, which you received, in which you stand,
 and by which you are being saved, if you hold fast to the word I preached to you--unless you believed in vain.
 For I delivered to you as of first importance what I also received: that Christ died for our sins in accordance with the Scriptures,
 that he was buried, that he was raised on the third day in accordance with the Scriptures,
 and that he appeared to Cephas, then to the twelve.
 Then he appeared to more than five hundred brothers at one time, most of whom are still alive, though some have fallen asleep.
 Then he appeared to James, then to all the apostles.
 Last of all, as to one untimely born, he appeared also to me.
 For I am the least of the apostles, unworthy to be called an apostle, because I persecuted the church of God.
 But by the grace of God I am what I am, and his grace toward me was not in vain. On the contrary, I worked harder than any of them, though it was not I, but the grace of God that is with me.

1 Corinthians 15:1-10

 ¹⁹Now we know that whatever the law says, it says to those who are under the law, so that every mouth may be silenced and the whole world held accountable to God. ²⁰Therefore no one will be declared righteous in his sight by observing the law; rather, through the law we become conscious of sin.

 ²¹But now a righteousness from God, apart from law, has been made known, to which the Law and the Prophets testify. ²²This righteousness from God comes through faith in Jesus Christ to all who believe. There is no difference, ²³for all have sinned and fall short of the glory of God, ²⁴and are justified freely by his grace through the redemption that came by Christ Jesus. ²⁵God presented him as a sacrifice of atonement,^[i] through faith in his blood. He did this to demonstrate his justice, because in his forbearance he had left the sins committed beforehand unpunished— ²⁶he did it to demonstrate his justice at the present time, so as to be just and the one who justifies those who have faith in Jesus.

Romans 3:19-26