The disciples are witnesses of Jesus' death and resurrection.

Luke 24:46–48

⁴⁶And said unto them, Thus it is written, and thus it behoved Christ to suffer, and to rise from the dead the third day:

⁴⁷And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem.

⁴⁸And ye are witnesses of these things.