וַיֹּ֨אמֶר יוֹאָ֜ב אֶל־הַמֶּ֗לֶךְ וְיוֹסֵ֣ף יְהוָה֩ אֱלֹהֶ֨יךָ אֶל־הָעָ֜ם כָּהֵ֤ם ׀ וְכָהֵם֙ מֵאָ֣ה פְעָמִ֔ים וְעֵינֵ֥י אֲדֹנִֽי־הַמֶּ֖לֶךְ רֹא֑וֹת וַאדֹנִ֣י הַמֶּ֔לֶךְ לָ֥מָּה חָפֵ֖ץ בַּדָּבָ֥ר הַזֶּֽה׃
האָט יוֹאָבֿ געזאָגט צום מלך זאָל גאָט דײַן האַר מערן דאָס פֿאָלק הונדערט מאָל אַזױ פֿיל װי זײ זײַנען, און די אױגן פֿון מײַן האַר דעם מלך זאָלן עס זען; אָבער צו װאָס װיל מײַן האַר דער מלך די דאָזיקע זאַך?
Rashi
Their [current] number. [Yoav meant with] the word כׇּהֵם to convey that their amount should double and the second word וְכָהֵם, to convey a second doubling to have now a total of four times [the original population] and then to again double the [new] total for one hundred times.1For a total of two hundred times the current population. It follows that Yoav's blessing was more then Moshe's who said, "One thousand times you [current] number".2Devorim 1:11. Furthermore, Moshe's blessing was only [to take effect] a long time [into the future] but Yoav's was intended [to take effect] immediately as it says [here], "[With] my master, the king's eyes [being able to] see it."