22 Ye shall not afflict any widow, or fatherless child.
23 If thou afflict them in any wise, and they cry at all unto me, I will surely hear their cry;
24 And my wrath shall wax hot, and I will kill you with the sword; and your wives shall be widows, and your children fatherless.”
So many people try to take advantage of needy situations. A widow may be feeling her loneliness, thus making it easier for a sexual predator to move at her. She may not have the know how to take care of the business her late spouse did, thus making it easier for fraud to occur against her.
Orphans, and children of single parents are susceptible to a myriad of influences, and some of them may not be in their best interest, or the best interest of their future.
Chilren who are neglected are sometimes kidnapped and used and abused in horrific ways.
God has a special place in His heart for widows and orphaned children. Causing them harm, in any way, would cause God's wrath to come down on you in ways that you couldn't even imagine. Your life would never be peaceful. All that you do to them would come back on you as punishment.
Many, in the "new age" world, would call that "karma". I call it God enacting justice.