Barnabas wanted to bring John called Mark along with them too,

When he saw Peter and John about to go into the temple courts, he asked them for money.

So Barnabas and Saul returned to Jerusalem when they had completed their mission, bringing along with them John Mark.

While the man was hanging on to Peter and John, all the people, completely astounded, ran together to them in the covered walkway called Solomon’s Portico.

Now when the apostles in Jerusalem heard that Samaria had accepted the word of God, they sent Peter and John to them.

When they arrived in Salamis, they began to proclaim the word of God in the Jewish synagogues. (Now they also had John as their assistant.)