Moses
Exodus 19:4ESV·traditional attribution

‘You yourselves have seen what I did to the Egyptians, and how I bore you on eagles’ wings and brought you to myself.

John Calvin Reformed @genevareformer

4. Ye have seen. With the view of gently inviting the people to obedience, He first recalls to their recollection the blessing of their deliverance, and then promises that the blessings of the future would be not inferior, if they on their part honored their deliverer with the piety and gratitude which belong to Him.

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

Ye have seen what I did to the Egyptians,.... The plagues he brought upon them in Egypt, and the destruction of them at the Red sea; these things they were eyewitnesses of, and needed no other proof or evidence to convince and assure them of them, and therefore must be under obligation to attend to what he was about to recommend unto them, for which...