עֵ֤דוּת ׀ בִּֽיה֘וֹסֵ֤ף שָׂמ֗וֹ בְּ֭צֵאתוֹ עַל־אֶ֣רֶץ מִצְרָ֑יִם שְׂפַ֖ת לֹא־יָדַ֣עְתִּי אֶשְׁמָֽע׃
He appointed it in Joseph for a testimony, when He went forth against the land of Egypt. The speech of one that I knew not did I hear:
Read kabbalistic (mystical) interpretation of Psalms 81:6: and classical mystical sources.