Moses
Exodus 3:12ESV·traditional attribution

He said, “But I will be with you, and this shall be the sign for you, that I have sent you: when you have brought the people out of Egypt, you shall serve God on this mountain.”

John Calvin Reformed @genevareformer

12. And he said, Certainly I will be with thee. It is remarkable that God sets his ready help alone against all to overcome every fear, and to take away every scruple; as much as to say, It matters not who Moses is, or what may be his strength, so that God be his leader.

Matthew Henry Presbyterian @wholebiblehenry

God, having spoken to Moses, allows him also a liberty of speech, which he here improves; and, I. He objects his own insufficiency for the service he was called to (Exo 3:11): Who am I? He thinks himself unworthy of the honour, and not par negotio - equal to the task.

Commenting on Exodus 3:11-15

John Gill Reformed Baptist @doctorgill

And he said, certainly I will be with thee,.... To encourage and strengthen him; to protect, defend, and preserve him, and to succeed and prosper him; to give him credit and respect with the people of Israel, and influence over Pharaoh to prevail upon him at length to let Israel go: and this shall be a token unto thee that I have sent thee; not...