Albert Barnes Commentary Psalms 94:5

"They break in pieces thy people, O Jehovah, And afflict thy heritage." — Psalms 94:5 (ASV)

They break in pieces your people - They tread down; they grind; they crush. The Hebrew word is often used as meaning to crush under foot; to trample on; and therefore, it means to oppress (Lamentations 3:34; Isaiah 3:15).

And afflict - That is, by oppression and wrong. If this refers to foreigners, it means that they did this by invasion and by the ravages of war.

Your heritage - Your people, regarded as an inheritance or possession. See Psalms 28:9; Psalms 33:12; Psalms 68:9; Psalms 74:2; Isaiah 19:25; Isaiah 47:6; 1 Peter 5:3.