וּשְׁאָ֧ר מִסְפַּר־קֶ֛שֶׁת גִּבּוֹרֵ֥י בְנֵֽי־קֵדָ֖ר יִמְעָ֑טוּ כִּ֛י יְהוָ֥ה אֱלֹהֵֽי־יִשְׂרָאֵ֖ל דִּבֵּֽר׃ (ס)
Es bleibt eine geringe Zahl der Bogenschützen, die Helden Kedars werden wenig sein, denn der Herr, der Gott Israels, hat es geredet.
Ibn Ezra on Isaiah
And the residue, etc. This expression indicates that the greater part will perish.
Rashi on Isaiah
the bows of the heroes of the children of Kedar Archers, for they are like their forefather, (Ishmael,) about whom it is stated (Gen. 21:2): “And he was an archer.”