Of First Importance
1 Corinthians 15:1-6
The Resurrection of Christ
15:1 Now I would remind you, brothers,  of the gospel I preached to you, which you received, in which you stand, 2 and by which you are being saved, if you hold fast to the word I preached to you—unless you believed in vain.
3 For I delivered to you as of first importance what I also received: that Christ died for our sins in accordance with the Scriptures, 4 that he was buried, that he was raised on the third day in accordance with the Scriptures, 5 and that he appeared to Cephas, then to the twelve. 6 Then he appeared to more than five hundred brothers at one time, most of whom are still alive, though some have fallen asleep. (ESV)
 15:1 Or brothers and sisters; also verses 6, 31, 50, 58