He shall judge the poor of the people. Not exclusively, but especially. The unjust rulers and judges of Israel neglected this duty. They judge not the fatherless … and the right of the needy do they not judge" (Jeremiah 5:28; see also Isaiah 1:23; Zechariah 7:10).
He shall save the children of the needy. He shall preserve them, i.e; from oppression and wrong. And shall break in pieces the oppressor. (On God's hatred of oppression and oppressors, see Exodus 3:9; Le Exodus 25:14; Job 27:13; Psalms 12:5; Isaiah 16:14, etc.