Ezekiel 3:5 Kabbalah

כִּ֡י לֹא֩ אֶל־עַ֨ם עִמְקֵ֥י שָׂפָ֛ה וְכִבְדֵ֥י לָשׁ֖וֹן אַתָּ֣ה שָׁל֑וּחַ אֶל־בֵּ֖ית יִשְׂרָאֵֽל׃

For thou art not sent to a people of an unintelligible speech and of a slow tongue, but to the house of Israel;

Read kabbalistic (mystical) interpretation of Ezekiel 3:5: and classical mystical sources.