וְעַתָּ֡ה שִׁלְח֣וּ מְהֵרָה֩ וְהַגִּ֨ידוּ לְדָוִ֜ד לֵאמֹ֗ר אַל־תָּ֤לֶן הַלַּ֙יְלָה֙ בְּעַֽרְב֣וֹת הַמִּדְבָּ֔ר וְגַ֖ם עָב֣וֹר תַּעֲב֑וֹר פֶּ֚ן יְבֻלַּ֣ע לַמֶּ֔לֶךְ וּלְכָל־הָעָ֖ם אֲשֶׁ֥ר אִתּֽוֹ׃
Rashi on II Samuel
Because [my suggestion] may be rejected by the king. That I did not advise him well and [instead] he will proceed according to the advice of Achitophel.
Rashi on II Samuel
Rejected. He will be told secretely and by a concealed method.