Luke
Acts 16:16BSB·traditional attribution

One day as we were going to the place of prayer, we were met by a slave girl with a spirit of divination, who earned a large income for her masters by fortune-telling.

John Calvin Reformed @genevareformer

16. Luke prosecuteth the increase of the Church; for though he do not straightway in a word express that thing, yet is it easily gathered out of the text, that many were brought into the faith, or at least that the Church was somewhat augmented, and Paul did not frequent the assemblies in time of prayer in vain.

Matthew Henry Presbyterian @wholebiblehenry

Paul and his companions, though they were for some time buried in obscurity at Philippi, yet now begin to be taken notice of. I. A damsel that had a spirit of divination caused them to be taken notice of, by proclaiming them to be the servants of God. Observe, 1.

Commenting on Acts 16:16-24

John Gill Reformed Baptist @doctorgill

And it came to pass as we went to prayer,.... That is, to the house of prayer, or to the oratory, as they were in the way to it; for this is not to be understood of their just going to the act, or duty of prayer; for the damsel that now met them, is said to follow them, and to do so for many...