"Take revenge for the children of Israel against the Midianites; afterwards you will be gathered to your people."
נְקֹם נִקְמַת בְּנֵי יִשְׂרָאֵל מֵאֵת הַמִּדְיָנִים אַחַר תֵּאָסֵף אֶל עַמֶּיךָ
Bamidbar 31:2
The injunction to take revenge against the Midianites starts with this mitzvah that Hashem communicates to Moshe. However, when Moshe turns to the people of Israel, he changes the language of this mitzvah.
So Moses spoke to the people, saying, "Arm from among you men for the army, that they can be against Midian, and carry out the revenge of the L-rd against Midian.
וַיְדַבֵּר משֶׁה אֶל הָעָם לֵאמֹר הֵחָלְצוּ מֵאִתְּכֶם אֲנָשִׁים לַצָּבָא וְיִהְיוּ עַל מִדְיָן לָתֵת נִקְמַת ה' בְּמִדְיָן
Bamidbar 31:3
The Kli Yakar asks why does Moshe change the description of the mitzvah that Hashem communicates to him?
