Albert Barnes Commentary Psalms 72:4

"He will judge the poor of the people, He will save the children of the needy, And will break in pieces the oppressor." — Psalms 72:4 (ASV)

He shall judge the poor of the people — The afflicted; the down-trodden; the needy. He would vindicate their cause against their oppressors; his reign would be one of impartial justice, under which the rights of the poor as well as of the rich would be respected. See the notes at (Isaiah 11:4).

He shall save the children of the needy — Those in humble life; those most likely to be oppressed by others; those who have no natural protectors.

And shall break in pieces the oppressor — Shall subdue, or destroy, those who live to oppress others. See the notes at (Psalms 12:5).