Moses
Exodus 19:6BSB·traditional attribution

And unto Me you shall be a kingdom of priests and a holy nation.’ These are the words that you are to speak to the Israelites.”

John Calvin Reformed @genevareformer

6. And ye shall be unto me. He points out more clearly, and more at length, how the Israelites will be precious unto God; viz., because they will be for “a kingdom of priests, and an holy nation.” By these words, he implies that they will be endowed with sacerdotal as well as royal honors; as much as to say, that they would not only...

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The date of that great charter by which Israel was incorporated. 1. The time when it bears date (Exo 19:1) - in the third month after they came out of Egypt. It is computed that the law was given just fifty days after their coming out of Egypt, in remembrance of which the feast of Pentecost was observed the fiftieth day after...

Commenting on Exodus 19:1-8

John Gill Reformed Baptist @doctorgill

And ye shall be unto me a kingdom of priests,.... Instead of being in a state of servitude and bondage, as they had been in Egypt, they should be erected into a kingdom, become a body politic, a free state, a commonwealth governed by its own laws, and those laws of God's making; yea, they should be a kingdom to him, and he be more...