וַיֹּ֣אמֶר מֹשֶׁ֔ה לָ֥מָּה זֶּ֛ה אַתֶּ֥ם עֹבְרִ֖ים אֶת־פִּ֣י יְהוָ֑ה וְהִ֖וא לֹ֥א תִצְלָֽח׃
And Moses said: ‘Wherefore now do ye transgress the commandment of the LORD, seeing it shall not prosper?
Read kabbalistic (mystical) interpretation of Numbers 14:41: and classical mystical sources.