I have seen, I have seen the affliction of my people which is in Egypt, and I have heard their groaning, and am come down to deliver them. And now come, I will send thee into Egypt.

I have surely seen the ill treatment of my people which is in Egypt, and I have heard their groan, and have come down to take them out of it; and now, come, I will send thee to Egypt.

seeing I have seen the affliction of My people that is in Egypt, and their groaning I did hear, and came down to deliver them; and now come, I will send thee to Egypt.

I have seen, yes, I have seen the oppression of My people who are in Egypt and have heard their groans, and I have come down to deliver them. And now I will send you to Egypt.'

Truly, I have seen the sorrows of my people in Egypt, and their cries have come to my ears, and I have come down to make them free: and now, come, I will send you to Egypt.

Certainly, I have seen the affliction of my people who are in Egypt, and I have heard their groaning. And so, I am coming down to free them. And now, go forth and I will send you into Egypt.'

I have seen the oppression of my people who are in Egypt, and heard their groans, and I have come down to deliver them. Come now and I will send you into Egypt.'

In seeing I have seen. God promiseth now that he will deliver his people, that he may appoint Moses to be his minister afresh, because the former objection was taken away by so long space of time. For God is said to see our miseries when he hath respect to us, and is careful for our safety; as he is said again to shut his eyes, and turn his back, when as he seemeth to set light by our cause. In like sort is he said to come down. He needeth not to move out of his place to help us, for his hand reacheth throughout the heaven and earth; but this is referred unto our understanding. For, seeing that he did not deliver his people from their affliction, he might seem that he was afar off, and was busied about some other thing in heaven. Now he saith that the Israelites shall perceive that he is nigh unto them. The sum tendeth to this end, that Moses knowing the will of God, may not doubt to follow him as a guide, and the more boldly to employ himself about the delivery of the people, which he knew was the work of God. For we must note that he saith that he heard the mourning of the people. For although he hath respect unto those which are in misery and unjustly oppressed, yet when we lay our mournings and complaints in his lap, he is especially moved to have mercy; although this word may be taken for those blind and confused complaints which are not directed unto God, as it is taken oftentimes elsewhere.

I have seen - The repetition of this word is in accordance with the usage of the Hebrew writers when they wish to represent anything emphatically.
Their groaning - Under their oppressions.
Am come down - This is spoken in accordance with human conceptions. It means that God was about to deliver them.
I will send thee - This is a mere summary of what is expressed at much greater length in Exodus 3:7-10.

I have seen, I have see the affliction of my people, &c. The repetition of the phrase denotes the certainty of it, the exquisite and exact knowledge the Lord took of the affliction of his people, and how much his heart was affected with it:
which is in Egypt; from whence Moses had fled and had left them, he being now in the land of Midian, which was the place of his sojourning: and
I have heard their groaning; under their various oppressions and burdens, and by reason of the cruel usage of their taskmasters:
and am come down to deliver them; not by local motion, or change of place, God being omnipresent, who fills all places at all times; but by the effects of his grace and power.
And now come, I will send thee into Egypt; to Pharaoh, the king of it, Exodus 3:10 to require of him to let the children of Israel go, and to deliver them out of their bondage.