Sforno on Exodus 32:15/ספורנו על שמות ל״ב:ט״ו

1ושני לוחות העדות בידו. He thought that as soon as he would return to the people they would become penitents; in the event that they would not, he planned to smash the Tablets in front of their eyes so that they would return in penitence after this shock.