Luke
Acts 2:42BSB·traditional attribution

They devoted themselves to the apostles’ teaching and to the fellowship, to the breaking of bread and to prayer.

John Calvin Reformed @genevareformer

42. In their doctrine Luke doth not only commend in them the constancy of faith or of godliness, but he saith, also, that they did constantly give themselves to those exercises which serve to the confirmation of faith; to wit, that they studied continually to profit by hearing the apostles; that they gave themselves much to prayer; that they did use fellowship and breaking of bread very much.

Matthew Henry Presbyterian @wholebiblehenry

We often speak of the primitive church, and appeal to it, and to the history of it; in these verses we have the history of the truly primitive church, of the first days of it, its state of infancy indeed, but, like that, the state of its greatest innocence. I.

Commenting on Acts 2:42-47

John Gill Reformed Baptist @doctorgill

Upon every inhabitant of Jerusalem, at least upon a great many of them; and upon all, or the greater part of them that saw, and heard these things; that heard the apostles speak with divers tongues, and Peter preach in the awful manner he did, and saw so many thousands at once embrace the Gospel of Christ, and profess his name, when it now, by...