וְהָיָה֮ בְּעָבְרְכֶ֣ם אֶת־הַיַּרְדֵּן֒ תָּקִ֜ימוּ אֶת־הָאֲבָנִ֣ים הָאֵ֗לֶּה אֲשֶׁ֨ר אָנֹכִ֜י מְצַוֶּ֥ה אֶתְכֶ֛ם הַיּ֖וֹם בְּהַ֣ר עֵיבָ֑ל וְשַׂדְתָּ֥ אוֹתָ֖ם בַּשִּֽׂיד׃
And it shall be when ye are passed over the Jordan, that ye shall set up these stones, which I command you this day, in mount Ebal, and thou shalt plaster them with plaster.
Read kabbalistic (mystical) interpretation of Deuteronomy 27:4: and classical mystical sources.