This was now the third time that Jesus appeared to the disciples after He was raised from the dead.

Mark 16:12
After this, Jesus appeared in a different form to two of them as they walked along in the country.

Mark 16:14
Later, as they were eating, Jesus appeared to the Eleven and rebuked them for their unbelief and hardness of heart, because they did not believe those who had seen Him after He had risen.

John 20:19
It was the first day of the week, and that very evening, while the disciples were together with the doors locked for fear of the Jews, Jesus came and stood among them. "Peace be with you!" He said to them.

John 20:26
Eight days later, His disciples were once again inside with the doors locked, and Thomas was with them. Jesus came and stood among them and said, "Peace be with you."

John 21:1
Later, by the Sea of Tiberias, Jesus again revealed Himself to the disciples. He made Himself known in this way:

Acts 1:3
After His suffering, He presented Himself to them with many convincing proofs that He was alive. He appeared to them over a span of forty days and spoke about the kingdom of God.

This is now the third time that Jesus showed himself to his disciples, after that he was risen from the dead.