The Masoretic Text has
“When the Most High divided to the nations their inheritance, when he separated the sons of Adam, he set the bounds of the people according to the number of the children of Israel.” (Deuteronomy 32:8 KJV)
4QDeutj
“When Elyon gave the nations as an inheritance, when he separated the sons of man, he set the boundaries of the peoples according to the number of the sons of God (bny ‘l[hym]). For Yahweh’s portion was his people; Jacob was the lot of his inheritance”.
LXX
“When the Most High divided the nations, when he separated the sons of Adam, he set the boundaries of the nations according to the number of the angels of God (aggelón theou). And his people Jacob became the portion of the Lord, Israel was the line of his inheritance”.
MT
“When Elyon gave the nations their inheritance, when he divided all the sons of man, he set the boundaries of the peoples according to the number of the sons of Israel (bny yshr’l). For Yahweh’s portion was his people, Jacob was the lot of his inheritance”.
Notice that bny el is similar to bny yshr’l. However, how does that become aggelon theou (angels of god)? This seems to be quite far-fetched.
Another version talks about sons of Bull El instead of sons of El:
When Elyon gave the nations an inheritance, when he divided humankind, he set the bounds of the peoples according to the number of Bull El’s children, and Yahweh’s portion was his people, Jacob, the lot of his inheritance.
This is a reading found in the ESV
When the Most High gave to the nations their inheritance, when he divided mankind, he fixed the borders of the peoples according to the number of the sons of God. (Deuteronomy 32:8 ESV)
And reflected in the Septuagint :”When the Most High divided to the nations their inheritance, when he separated the sons of Adam, he set the bounds of the people according to the number of the angels.”
32:8 ὅτε διεμέριζεν ὁ ὕψιστος ἔθνη ὡς διέσπειρεν υἱοὺς Αδαμ ἔστησεν ὅρια ἐθνῶν κατὰ ἀριθμὸν ἀγγέλων θεοῦ
https://hermeneutics.stackexchange.com/questions/7862/what-is-the-original-text-of-deuteronomy-328-9