A.T. Robertson Commentary Acts 16:30

"and brought them out and said, Sirs, what must I do to be saved?" — Acts 16:30 (ASV)

Brought them out (προγαγων αυτους εξω). Second aorist active participle of προαγω, to lead forward. He left the other prisoners inside, feeling that he had to deal with these men whom he had evidently heard preach or had heard of their message as servants of the Most High God as the slave girl called them. There may have been superstition behind his fear, but there was evident sincerity.