וְהֵמַתָּ֛ה אֶת־הָעָ֥ם הַזֶּ֖ה כְּאִ֣ישׁ אֶחָ֑ד וְאָֽמְרוּ֙ הַגּוֹיִ֔ם אֲשֶׁר־שָׁמְע֥וּ אֶֽת־שִׁמְעֲךָ֖ לֵאמֹֽר׃
now if Thou shalt kill this people as one man, then the nations which have heard the fame of Thee will speak, saying:
Read kabbalistic (mystical) interpretation of Numbers 14:15: and classical mystical sources.