Start with Luke 21 …

He also saw a poor widow put in two very small copper coins. “Truly I tell you,” he said, “this poor widow has put in more than all the others.

Sounds… nice, poor people should give, right? Then read just before the unfortunate? chapter break at the end of Luke 20

“Beware of the teachers of the law. They like to walk around in flowing robes and love to be greeted with respect in the marketplaces and have the most important seats in the synagogues and the places of honor at banquets. They devour widows’ houses and for a show make lengthy prayers. These men will be punished most severely.”