Moses
Exodus 6:9ESV·traditional attribution

Moses spoke thus to the people of Israel, but they did not listen to Moses, because of their broken spirit and harsh slavery.

John Calvin Reformed @genevareformer

9. And Moses spake so. From this verse it appears that Moses is referring to the second message which he was commanded to bear. For they had before heard with great joy and approbation, and had expressed their thankfulness to God, that the time of their deliverance was come. Now Moses relates that their hearts were shut against the announcement that he made to them of this grace.

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

And the Lord spake unto Moses,.... At another time, and renewed his orders to him to go again to Pharaoh, and require their dismission: saying; as follows: