Genesis 3:14 (BSB)

So the LORD God said to the serpent: “Because you have done this, cursed are you above all livestock and every beast of the field! On your belly will you go, and dust you will eat, all the days of your life.

From Genesis 3. Also in the ESV.

Commentary on Genesis 3:14

• John Calvin (Reformed), Calvin's Commentaries on Genesis 3:14: 14. And the Lord God said unto the serpent . He does not interrogate the serpent as he had done the man and the woman; because, in the animal itself there was no sense of sin, and because, to the devil he would hold out no hope of pardon. He might truly, by his own authority, have pronounced sentence against Adam and Eve, though unheard.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Genesis 3:14-15: The prisoners being found guilty by their own confession, besides the personal and infallible knowledge of the Judge, and nothing material being offered in arrest of judgment, God immediately proceeds to pass sentence; and, in these verses, he begins (where the sin began) with the serpent. God did not examine the serpent, nor ask him what he had done nor why he did it; but immediately sentenced him, 1.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Genesis 3:14: And the Lord God said unto the serpent,.... And to the devil in it; for what follows may be applied to both; literally to the serpent, and mystically to Satan; both are punished, and that very justly, the serpent in being the instrument Satan made use of, and is cursed for his sake, as the earth for man's; and the punishing the instrument as well...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Genesis 3:14-24: THE SENTENCE. (Gen 3:14-24) And the Lord God said unto the serpent--The Judge pronounces a doom: first, on the material serpent, which is cursed above all creatures. From being a model of grace and elegance in form, it has become the type of all that is odious, disgusting, and low [LE CLERC, ROSENMULLER]; or the curse has converted its natural condition into a punishment; it...