Albert Barnes' Notes on the Whole Bible - Exodus 4:6
Leprous - The instantaneous production and cure of the most malignant and subtle disease known to the Israelites was a sign of their danger if they resisted the command, and of their deliverance if they obeyed it. The infliction and cure were always regarded as special proofs of a divine intervention. read more
The Pulpit Commentary - Exodus 4:6-8
The intent of the second sign. If the first sign was powerful to convince, the second was still more powerful ( Exodus 4:8 ). It showed Moses able to produce, and cure, in a moment of time, the most virulent malady to which human nature was liable. The Egyptians greatly feared leprosy, and declared in their own accounts of the Exodus that they drove the Israelites out of their country because they were afflicted with that loathsome disease. The Israelites regarded it as the worst... read more