Psalm 82:3-4 (NIV) 3 Defend the cause of the weak and fatherless; maintain the rights of the poor and oppressed. 4 Rescue the weak and needy; deliver them from the hand of the wicked.
Isaiah 1:17 (NIV) Learn to do right! Seek justice, encourage the oppressed. Defend the cause of the fatherless, plead the case of the widow.
Micah 6:8 (ESV) He has told you, O man, what is good; and what does the LORD require of you but to do justice, and to love kindness, and to walk humbly with your God?
"Injustice anywhere is a threat to justice everywhere."
—Martin Luther King, Jr.
Leadership, Vol. 20, no. 1., Today's Best Illustrations – Volume 5, (Carol Stream, IL: Christianity Today, 1997), WORDsearch CROSS e-book, Under: "INJUSTICE".