Albert Barnes Commentary Psalms 94:6

"They slay the widow and the sojourner, And murder the fatherless." — Psalms 94:6 (ASV)

They slay the widow and the stranger, and murder the fatherless - To do this is everywhere represented as a special crime, and as especially offensive to God from the fact that these classes are naturally feeble and unprotected. See the notes at Isaiah 1:17; Psalms 68:5; Psalms 82:3.