Luke
Acts 4:20BSB·traditional attribution

For we cannot stop speaking about what we have seen and heard.”

John Calvin Reformed @genevareformer

20. For we cannot Many things which are found out by hearing and seeing may, yea, ought to be concealed, when as the question is concerning the redeeming of peace. For this is a point of discourtesy and of wicked stubbornness to move and raise a tumult about unnecessary matters; but the apostles do not speak generally, when as they say they cannot but speak.

Matthew Henry Presbyterian @wholebiblehenry

We have here the issue of the trial of Peter and John before the council. They came off now with flying colours, because they must be trained up to sufferings by degrees, and by less trials be prepared for greater. They now but run with the footmen; hereafter we shall have them contending with horses, Jer 12:5. I.

Commenting on Acts 4:15-22

John Gill Reformed Baptist @doctorgill

For we cannot but speak,.... It was not physically, but morally impossible; or it was not lawful, and therefore they would not speak any other, and they could not avoid speaking, say they, the things which we have seen and heard; as the miracles and doctrines of Christ, his resurrection from the dead, of which they were eye and ear witnesses.