Moses
Leviticus 26:20ESV·traditional attribution

And your strength shall be spent in vain, for your land shall not yield its increase, and the trees of the land shall not yield their fruit.

Matthew Henry Presbyterian @wholebiblehenry

After God had set the blessing before them (the life and good which would make them a happy people if they would be obedient), he here sets the curse before them, the death and evil which would make them as miserable if they were disobedient.

Commenting on Leviticus 26:14-39

John Gill Reformed Baptist @doctorgill

And if ye walk contrary unto me,.... To his mind and will, to his laws, commands, and ordinances, showing no regard unto them by a walk and conversation agreeably to them, but neglecting and breaking them continually; or by chance, as the Targum of Jonathan, not with any intention and design to obey the Lord, and to honour and glorify him, but in a careless...

Jamieson-Fausset-Brown Reformed @jfbcommentary

A CURSE TO THE DISOBEDIENT. (Lev. 26:14-39) But if ye will not hearken unto me, &c.--In proportion to the great and manifold privileges bestowed upon the Israelites would be the extent of their national criminality and the severity of their national punishments if they disobeyed.

Commenting on Leviticus 26:14-39