Now brothers, I want to clarify for you the gospel I proclaimed to you; you received it and have taken your stand on it.
References for 1 Corinthians 15:1
You are also saved by it, if you hold to the message I proclaimed to you-unless you believed to no purpose.
References for 1 Corinthians 15:2
For I passed on to you as most important what I also received: that Christ died for our sins according to the Scriptures,
that He was buried, that He was raised on the third day according to the Scriptures,
and that He appeared to Cephas, then to the Twelve.
Then He appeared to over 500 brothers at one time, most of whom remain to the present, but some have fallen asleep.
References for 1 Corinthians 15:6
Then He appeared to James, then to all the apostles.
Last of all, as to one abnormally born, He also appeared 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 God's grace I am what I am, and His grace toward me was not ineffective. However, I worked more than any of them, yet not I, but God's grace that was with me.
Therefore, whether it is I or they, so we preach and so you have believed.