The ancient kerygma

I Corinthians 15:3-4
For I delivered to you first of all that which I also received: that Christ died for our sins according to the Scriptures, and that He was buried, and that He rose again the third day according to the Scriptures.

This is the ancient kerygma, which predates Paul’s ministry, for he says he received it, and it was “according to the [Old Testament] Scriptures.”