Moses
Exodus 32:15BSB·traditional attribution

Then Moses turned and went down the mountain with the two tablets of the Testimony in his hands. They were inscribed on both sides, front and back.

John Calvin Reformed @genevareformer

15. And Moses turned, and went down, from the mount Moses comes down by God’s command to be a spectator of this wicked revolt, that the enormity of the act might the more arouse him both to disgust and detestation of the crime, and to the endeavor to find a remedy for it.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The favour of God to Moses, in trusting him with the two tables of the testimony, which, though of common stone, were far more valuable than all the precious stones that adorned the breast-plate of Aaron. The topaz of Ethiopia could not equal them, Exo 32:15, Exo 32:16.

Commenting on Exodus 32:15-20

John Gill Reformed Baptist @doctorgill

And the tables were the work of God,.... And not of angels or men; the stones were made and formed by God into the shape they were: and the writing was the writing of God, graven upon the tables; the letters in which the law was written were of his framing, devising, and engraving; and this was to show that this law was his own...