The Pulpit Commentary - Exodus 4:3
It became a serpent . The word here used for "serpent," nakhash , is a generic word applicable to any species of snake. We cannot assume that the cobra is the serpent meant, though no doubt Moses, when he fled from before it , believed it to be a venomous serpent. Various reasons for God's choice of this particular sign have been given. Perhaps the best is, that a trick of the kind was known to the Egyptian conjurors, who would be tempted to exhibit it in order to discredit Moses,... read more
The Pulpit Commentary - Exodus 4:1-17
Divine supplements for human infirmity. "Now therefore go, and I will be with thee," etc. ( Exodus 4:12 .) It is not at all clear whether the four objections urged by Moses against receiving the Divine commission were presented at one interview with the manifested God, or whether the controversy recorded Ex 3:1-4:17, occupied weeks or months. The probabilities are in favour of some considerable time. See Exodus 4:10 , and specially in the Hebrews In dealing with this particular plea,... read more