In the NT there are six accounts of what followed the resurrection of Jesus. Each of the four Gospels contains an account (Matt 28; Mark 16; Luke 24; John 20–21), and there are two others (Acts 1:1–11; 1 Cor 15:1–11)1
But the questions concerning the Resurrection were basically concerning proof. So the six accounts provide the testimony of eyewitnesses who claimed to have seen not only the empty tomb but also the resurrected Jesus.