לְמַ֤עַן ׀ תִּֽמְחַ֥ץ רַגְלְךָ֗ בְּ֫דָ֥ם לְשׁ֥וֹן כְּלָבֶ֑יךָ מֵאֹיְבִ֥ים מִנֵּֽהוּ׃
好叫你的腳踏過血泊，你家狗的舌頭也從仇敵身上得著牠的份。
Rashi
In order that your foot may wade through blood When He crushes the head of the enemy, our feet will wade through their blood. תִּמְחַץ is an expression of splitting into the blood, as (Jud. 5: 26): “she split (ומחצה) and penetrated his temple,” like בָּקְעָה, she split. This is Mishnaic Hebrew: “and the pilgrims were wading (בוקעים) up to their knees in blood.” Another explanation: תִּמְחַץ The name of a vessel with which they draw wine from the pit is called מַחַץ, in Tractate Avodah Zarah (72b).
Rashi
will have its portion Heb. מנהו, its sustenance will be, as we say (Suc. 39b): “How do we know that מן is an expression of food?” For it is written (Dan. 1: 10): “who appointed (מנה) your food, etc.”