Because of affection for the demons, Viśvarūpa secretly supplied them the remnants of yajña. When Indra learned about this, he beheaded Viśvarūpa, but he later regretted killing Viśvarūpa because Viśvarūpa was a brāhmaṇa. Although competent to neutralize the sinful reactions for killing a brāhmaṇa, Indra did not do so. Instead he accepted the reactions. Later, he distributed these reactions among the land, water, trees and women in general. Since the land accepted one fourth of the sinful reactions, a portion of the land turned into desert. The trees were also given one fourth of the sinful reactions, and therefore they drip sap, which is prohibited for drinking. Because women accepted one fourth of the sinful reactions, they are untouchable during their menstrual period. Since water was also infested with sinful reactions, when bubbles appear in water it cannot be used for any purpose.