Deuteronomy 4:20 Kabbalah

וְאֶתְכֶם֙ לָקַ֣ח יְהוָ֔ה וַיּוֹצִ֥א אֶתְכֶ֛ם מִכּ֥וּר הַבַּרְזֶ֖ל מִמִּצְרָ֑יִם לִהְי֥וֹת ל֛וֹ לְעַ֥ם נַחֲלָ֖ה כַּיּ֥וֹם הַזֶּֽה׃

But you hath the LORD taken and brought forth out of the iron furnace, out of Egypt, to be unto Him a people of inheritance, as ye are this day.

Read kabbalistic (mystical) interpretation of Deuteronomy 4:20: and classical mystical sources.