Adam Clarke's Commentary on the Bible - Exodus 4:4
He put forth his hand, and caught it - Considering the light in which Moses had viewed this serpent, it required considerable faith to induce him thus implicitly to obey the command of God; but he obeyed, and the noxious serpent became instantly the miraculous rod in his hand! Implicit faith and obedience conquer all difficulties; and he who believes in God, and obeys him in all things, has really nothing to fear. read more
Adam Clarke's Commentary on the Bible - Exodus 4:3
A serpent - Of what sort we know not, as the word נחש nachash is a general name for serpents, and also means several other things, see Genesis 3:1 ; : but it was either of a kind that he had not seen before, or one that he knew to be dangerous; for it is said, he fled from before it. Some suppose the staff was changed into a crocodile; see Clarke on Exodus 7:10 ; (note). read more