When the Jerusalem disciples were afraid of the newly converted Saul, who brought him to the apostles?

Answer: Barnabas

Barnabas brought Saul to the apostles and told how Saul had seen the Lord and preached boldly in Damascus.

“Then Barnabas brought him to the apostles and described how Saul had seen the Lord, who had spoken to him on the road to Damascus, and how Saul had spoken boldly in that city in the name of Jesus.”— Acts 9:27 (BSB)