וַיַּכְשִׁיל֣וּהוּ עָלֵ֣ימוֹ לְשׁוֹנָ֑ם יִ֝תְנֹדֲד֗וּ כָּל־רֹ֥אֵה בָֽם׃
Таким образом, они делают свой собственный язык камнем преткновения для себя; все что видят их качают головой.
Rashi
That which they hoped would make him stumble, their tongue brought upon them The stumbling they planned to inflict on him, their tongue turned over upon them.
Rashi
will shake their heads Heb. יתנודדו, will shake their head; all who see them should nod their head and laugh about them.