Moses
Exodus 6:5BSB·traditional attribution

Furthermore, I have heard the groaning of the Israelites, whom the Egyptians are enslaving, and I have remembered My covenant.

John Calvin Reformed @genevareformer

5. And I have also heard the groaning. He assigns the reason why He so long had delayed to fulfill His promise, viz., because He would have His people sorely troubled, that He might more openly succor them in their affliction; besides, He chose that they should be unjustly oppressed by the Egyptians, in order that He might more justly rescue them from their tyrannical...

Matthew Henry Presbyterian @wholebiblehenry

Here, I. God silences Moses's complaints with the assurance of success in this negotiation, repeating the promise made him in Exo 3:20, After that, he will let you go. When Moses was at his wit's end, wishing he had staid in Midian, rather than have come to Egypt to make bad worse - when he was quite at a loss what to do - Then...

Commenting on Exodus 6:1-9

John Gill Reformed Baptist @doctorgill

Wherefore say unto the children of Israel, I am the Lord,.... Eternal in his being, immutable in his counsels, faithful to his covenant, and able to fulfil it: and I will bring you out from under the burdens of the Egyptians; which lay heavy on them, and made them sigh and groan: and I will rid you out of their bondage; in which they were...