מלכם [מַה־] [לָּכֶם֙] תְּדַכְּא֣וּ עַמִּ֔י וּפְנֵ֥י עֲנִיִּ֖ים תִּטְחָ֑נוּ נְאֻם־אֲדֹנָ֥י יְהוִ֖ה צְבָאֽוֹת׃ (ס)
What mean ye that ye crush My people, And grind the face of the poor?’ Saith the Lord, the GOD of hosts.
Rashi on Isaiah
What to you mean Heb. מַלָּכֶם, like מַה לָכֶם, what do you mean? [lit. What is to you?]
Ibn Ezra on Isaiah
מלכם What mean you ? Dagesh in ל compensates for the omitted מה לכם ═ מלכם .ה is compounded, of two words, like (מה זה ═)מזה What is that (Exod. 4:3).
Rashi on Isaiah
you grind Crush and degrade to disgrace them in their lawsuit.