 Annoyed, Brahma requested god Indra(the king of heaven) to find a suitable girl for him to wed to complete the yajna.Indra could find only a Gujar's daughter (a milkmaid) who was sanctified by passing her through the body of a cow.Gods Vishnu, Shiva and the priests certified her purity as she had passed through a cow, it was her second birth and she was named Gayatri (goddess of milk).