John Calvin on Isaiah 15:6

6. The waters of Nimrim. By an exaggerated form of expression he gives a more enlarged view of this desolation. He says that the grass is withered, which takes place when God leaves any soil destitute of all nourishment. The waters will be taken away, which probably were highly necessary for that dry and parched country; for soils of that kind produce nothing without irrigation. Though the style is exaggerated, yet nothing is stated but what is strictly true; for the Prophet did not go beyond proper bounds, but found it necessary to use bold expressions to suit the ignorance of the people, in order to inform them that a land which is deprived of the blessing of God will be like a desert without any beauty.