Where does Paul define the gospel as Christ dying for our sins, being buried, and rising again?
Paul defines the gospel in 1 Corinthians 15, stating that Christ died for our sins, was buried, and rose again. The context notes this same gospel message repeatedly appears throughout Paul's writings, including 2 Corinthians 5:15, where Christ died for all and rose again.
Les teaches that the Scripture constantly brings in this truth: "he died for all, that they who live should not henceforth live unto themselves, but unto him who died for them, and rose again." He identifies that as the Gospel and reminds listeners that Paul delineates it as the Gospel in 1 Corinthians 15: how that Christ died for our sins, He was buried, and He rose again. Les warns that believing anything else is not believing the Gospel but a false Gospel, and notes the Holy Spirit prompted Paul to bring it up repeatedly.
For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures;
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What does Paul say is the content of our gospel?
Paul says we know only Christ crucified and risen from the dead, and that is our gospel.