וַיִּשְׁכְּנ֨וּ מֵֽחֲוִילָ֜ה עַד־שׁ֗וּר אֲשֶׁר֙ עַל־פְּנֵ֣י מִצְרַ֔יִם בֹּאֲכָ֖ה אַשּׁ֑וּרָה עַל־פְּנֵ֥י כָל־אֶחָ֖יו נָפָֽל׃ (פ)
And they dwelt from Havilah unto Shur that is before Egypt, as thou goest toward Asshur: over against all his brethren he did settle.
Read kabbalistic (mystical) interpretation of Genesis 25:18: and classical mystical sources.