Moses
Exodus 4:6ESV·traditional attribution

Again, the LORD said to him, “Put your hand inside your cloak.” And he put his hand inside his cloak, and when he took it out, behold, his hand was leprous like snow.

John Calvin Reformed @genevareformer

6. Put now thy hand into thy bosom. By this sign Moses was instructed that what is in the greatest vigour withers away at once, at the command of God; and that what is dry is thus restored to its original vigour; in a word, the statement of Paul was confirmed by it, that God “calleth those things which be not, as though they were.”...

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 furthermore unto him,.... Continued his discourse, and gave him another sign: put now thine hand into thy bosom. And he put his hand into his bosom; within his coat, under that part of the garment next to his breast: and when he took it out, behold, his hand was leprous as snow; that is, white as snow, as the Targums of...