In the Mahabharata, during Duryodhana's visit to the Pandavas' Maya Sabha (hall of illusions), he mistakes a crystal pool for a solid floor and falls in. Draupadi laughs and taunts him saying 'the blind son of a blind man' - mocking both him and his blind father Dhritarashtra. This humiliation deeply angered Duryodhana and became a primary motivation for his vengeance, culminating in the dice game where Draupadi was dishonored.