Someone in the crowd said to Him, "Teacher, tell my brother to divide the family inheritance with me." But He said to him, "Man, who appointed Me a judge or arbitrator over you?" Then He said to them, "Beware, and be on your guard against every form of greed; for not even when one has an abundance does his life consist of his possessions." (Luke 12:13-15 NASB)
A man in the crowd spoke out and asked Jesus to intervene in a family dispute. He wanted his brother to divide the inheritance with him. The law required that the eldest son receive a double portion. Some commentators (including Matthew Henry) believe that this was a younger son who wanted a larger portion. He would have Jesus take from the older brother's legally obtained portion and give it to him. (The discussion about greed and coveting that follows suggests that this was not an inheritance that had been taken from him, but that he wanted to take it from his brother.)
When I read Matthew Henry's commentary on this passage, I was surprised. "In matters of this nature, Christ will not assume either a legislative power to alter the settled rule of inheritances, or a judicial power to determine controversies concerning them."
This is so well written that I've copied a section of his commentary below. I know that, in this day of outrage, it may not be well-received. Remember as you read it that this was written in the late 1600's. This was a time of considerable unrest and severe religious persecution in England. Many people fled to the Americas to escape that persecution.