Risen ... According to the Scriptures: The Resurrection in the Old Testament

In Paul's explanation of the gospel to the Corinthians in 1 Cor 15:4, he includes Christ's resurrection on the third day, according to the Scriptures. What Scriptures was Paul referring to? Did people in the Old Testament believe in a resurrection? Did the apostles expect Jesus to rise from the dead?

Although complete revelation did not come until God spoke truth through Christ, the Old Testament is a tutor and contains shadows, so we would expect to find shadows of the resurrection in the OT.