This (among a few other reasons) is why Jesus went on a rant against the religious leaders of the day in Matthew chapter 23. One of the practices at the time w

This (among a few other reasons) is why Jesus went on a rant against the religious leaders of the day in Matthew chapter 23. One of the practices at the time was for Pharisees to give all their possessions to the temple (of which they were members), therefore effectively being so poor that they could tell their elderly parents: "I have nothing to give you", this practice was known as Corban. Jesus condemned the people of the day for that in Mark 7. In short, as Jesus said: "Woe to you, scribes and Pharisees, hypocrites! For you travel land and sea to win one proselyte, and when he is won, you make him twice as much a son of hell as yourselves"