The sage Maitreya cursed Duryodhana that he would die when his thigh was broken by Bhima. This curse was significant because Duryodhana had previously shown disrespect to Maitreya. During the Kurukshetra war, Bhima fulfilled this curse by striking Duryodhana's thigh with his mace, which led to Duryodhana's death - a violation of the rules of mace combat.