בַּיּ֣וֹם הַה֗וּא יִֽהְיֶ֤ה מִזְבֵּ֙חַ֙ לַֽיהוָ֔ה בְּת֖וֹךְ אֶ֣רֶץ מִצְרָ֑יִם וּמַצֵּבָ֥ה אֵֽצֶל־גְּבוּלָ֖הּ לַֽיהוָֽה׃
In that day shall there be an altar to the LORD in the midst of the land of Egypt, and a pillar at the border thereof to the LORD.
Read Jewish philosophical commentary on Isaiah 19:19: and classical philosophical sources.