But the LORD said to Moses, “Put out your hand and catch it by the tail”—so he put out his hand and caught it, and it became a staff in his hand—
It was a very great honour that Moses was called to when God commissioned him to bring Israel out of Egypt; yet he is with difficulty persuaded to accept the commission, and does it at last with great reluctance, which we should rather impute to a humble diffidence of himself and his own sufficiency than to any unbelieving distrust of God and his word and power.
Commenting on Exodus 4:1-9
And the Lord said to Moses, put forth thy hand, and take it by the tail,.... Which to do might seem most dangerous, since it might turn upon him and bite him; this was ordered, partly that Moses might be assured it was really a serpent, and not in appearance only; and partly to try his courage, and it suggested to him, that he need...
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!