Parallel
Exodus 3:12
Brenton's English Septuagint · Berean Standard Bible
And God spoke to Moses, saying, I will be with thee, and this shall be the sign to thee that I shall send thee forth,—when thou bringest out my people out of Egypt, then ye shall serve God in this mountain.
“I will surely be with you,” God said, “and this will be the sign to you that I have sent you: When you have brought the people out of Egypt, all of you will worship God on this mountain (note: Cited in Acts 7:7).”