Acts 16:18

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.

And this did she many days - that is, on many successive occasions when on their way to their usual place of meeting, or when engaged in religious services.

But Paul being grieved - for the poor victim; grieved to see such power possessed by the enemy of man's salvation, and grieved to observe the malignant design with which this high testimony was borne to Christ.