Barnabas.

Acts 4:36
Joseph, a Levite from Cyprus, whom the apostles called Barnabas (meaning Son of Encouragement),

Acts 11:22, 25
When news of this reached the ears of the church in Jerusalem, they sent Barnabas to Antioch. . . .

Acts 12:25
When Barnabas and Saul had fulfilled their mission to Jerusalem, they returned, bringing with them John, also called Mark.

Acts 13:2
While they were worshiping the Lord and fasting, the Holy Spirit said, "Set apart for Me Barnabas and Saul for the work to which I have called them."

Acts 15:2, 25, 26, 35-39
So Paul and Barnabas engaged these men in sharp debate. The two of them were appointed, along with some other believers, to go up to Jerusalem to see the apostles and elders about this question. . . .

1 Corinthians 9:6
Or are Barnabas and I the only apostles who must work for a living?

Galatians 2:9, 13
And recognizing the grace I had been given, James, Cephas, and John--those reputed to be pillars--gave me and Barnabas the right hand of fellowship, so that we should go to the Gentiles and they to the Jews. . . .

the apostles.

Galatians 1:18, 19
Only after three years did I go up to Jerusalem to confer with Cephas, and I stayed with him fifteen days. . . .

how he had seen.

Acts 9:17
So Ananias went to the house, and when he arrived, he placed his hands on Saul. "Brother Saul, " he said, "the Lord Jesus, who appeared to you on the road as you were coming here, has sent me so that you may see again and be filled with the Holy Spirit."

1 Corinthians 15:8
And last of all He appeared to me also, as to one of untimely birth.

and how.

Acts 9:20-22
Saul promptly began to proclaim Jesus in the synagogues, declaring, "He is the Son of God." . . .

Acts 4:13, 29
When they saw the boldness of Peter and John and realized that they were unschooled, ordinary men, they were astonished and recognized that they had been with Jesus. . . .

Ephesians 6:19, 20
Pray also for me, that whenever I open my mouth, divine utterance may be given me, so that I will boldly make known the mystery of the gospel, . . .