John Gill Commentary Acts 9:28

"And he was with them going in and going out at Jerusalem," — Acts 9:28 (ASV)

And be was with them
Peter and James, and the rest of the disciples; he lived with them, conversed with them, and joined with them in all religious exercises; which is signified by his

coming in and going out at Jerusalem ;
no one of the apostles or disciples forbidding or hindering him.