1 Corinthians 15:2-8

and by which you are being saved, if you hold to the message I preached to you — unless you believed in vain. 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 five hundred brothers and sisters at one time; most of them are still alive, but some have fallen asleep. Then he appeared to James, then to all the apostles. Last of all, as to one born at the wrong time, he also appeared to me.