Acts 16:16-24 (KJV)
16 And it came to pass, as we went to prayer, a certain damsel possessed with a spirit of divination met us, which brought her masters much gain by soothsaying:
17 The same followed Paul and us, and cried, saying, These men are the servants of the most high God, which shew unto us the way of salvation.
18 And this did she many days. But Paul, being grieved, turned and said to the spirit, I command thee in the name of Jesus Christ to come out of her. And he came out the same hour.
19 And when her masters saw that the hope of their gains was gone, they caught Paul and Silas, and drew them into the marketplace unto the rulers,
- Facts that we have from God's word are:
Damsel was possessed with this spirit of divination (there may have been others in the area - an unknown from the text).
The damsel brought her masters much gain by soothsaying.
She followed Paul and the other men preaching the truth about the men.
She did it for many days (We do not know how many).
Paul was grieved and spoke directly to the spirit.
The spirit left the same hour that Paul commanded it to leave (We do not know where it went).
The gainsayers caught Paul and Silas.