Moses
Exodus 4:2BSB·traditional attribution

And the LORD asked him, “What is that in your hand?” “A staff,” he replied.

John Calvin Reformed @genevareformer

2. What is that in thine hand? In accordance with the idiom of the Hebrew language, Moses now explains more fully, and more distinctly pursues, what he had before only generally alluded to respecting the signs. In the three signs which he refers to we must consider their respective meanings The pastoral crook, which he carried in his hand, is flung on the ground, and...

Matthew Henry Presbyterian @wholebiblehenry

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

John Gill Reformed Baptist @doctorgill

And the Lord said unto him,.... Not reproving him for contradicting him, or showing any diffidence of what he had said; but rather as approving the hint he gave of having some sign or miracle wrought, to command from the Israelites an assent unto him, as commissioned of God to deliver them: what is that in thine hand?