They slay the widow and the stranger, and murder the fatherless.
Read Chapter 94
Augustine of Hippo
6. ..."They have humbled Thy people, O Lord; and have troubled Thine heritage" (ver. 5). "They have murdered the widow, and the fatherless: and slain the proselyte" (ver. 6); that is, the traveller, the pilgrim: the comer from far, as the Psalmist calleth himself. Each of these expressions is too clear in meaning to make it worth while to dwell upon them. ...
Fatherless. Septuagint places this after widow, and have here the stranger, or "proselyte "(Haydock) including those who were circumcised, or had only renounced idolatry.
Jeremias and Ezechiel describe the cruelty of the Chaldeans. (Calmet)
Similar acts of impious rage are but too visible in all ages. (Haydock) ...