Exodus 1:11
10 Come, let’s deal wisely with them. Otherwise they will continue to multiply, and if a war breaks out, they will ally themselves with our enemies and fight against us and leave the country.” 11 So they put foremen over the Israelites to oppress them with hard labor. As a result they built Pithom and Rameses as store cities for Pharaoh. 12 But the more the Egyptians oppressed them, the more they multiplied and spread. As a result the Egyptians loathed the Israelites,
LXX Exodus 1:11
10 Come, therefore, let us deal shrewdly with them, in case they multiply greatly, and at that time war may happen to us, these people also will reinforce our enemies, and waging war against us, they will go forth out of the land.” 11 And he placed supervisors of the works over them that they might afflict them in their labors, and they constructed fortified cities for Pharaoh: Pithom, Rameses, and On, which is Heliopolis. 12 But, just when they humbled them, they became so much more numerous, and they became very exceedingly strong. And the Egyptians were in dread of the sons of Israel.
Notes and References
"... The Hebrew word “Aven” means “idolatry” or “iniquity,” and the Masoretic text used it to make a derisive wordplay or misvocalization of the name of the Egyptian city of “On.” The translator moves in the opposite direction, apparently changing from the plain of Aven, perhaps the plain between Lebanon and Anti-Lebanon in Syria, to On, or Heliopolis, located at the southern tip of the Nile Delta in Egypt and the main cult center of Re, the sun-god. (See LXX Ezekiel 30:17) The connection of “On” and “Heliopolis” is explicit in Genesis 41:50 where the Septuagint has “Potiphar the priest of Heliopolis” instead of “On”; note also Jeremiah 50:13 and the LXX plus in Exodus 1:11) ..."
Glenny, W. Edward Finding Meaning in the Text: Translation Technique and Theology in the Septuagint of Amos (p. 63) Brill, 2009