Not mentioned in your article, but I would be grateful for your thoughts and any information you have on the following question.

In 1 Corinthians 15 Paul says that he 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...” Do you know which scriptures he is referring to? As far as I'm aware there is nothing relevant in the Old Testament. If not, what scriptures does he possess that we are not aware of?