Kosala Kingdom Mahabharata, Book 3, Chapter 85 Sojourning next to the tirtha called Rishabha in Kosala and fasting there for three nights one earneth the merit of the Vajapeya sacrifice, and of the gift of a thousand kine, and also delivereth his race. Arriving at 'Kosala, a man should bathe in the tirtha named Kala. Karna's Military Campaign Mahabharata, Book 3, Chapter 252 Having conquered the eastern quarter Karna then presented himself before Batsa-bhumi. And having taken Batsa-bhumi, he reduced Kevali, and Mrittikavati, and Mohana and Patrana, and Tripura, and Kosala,--and compelled all these to pay tribute. Ramayana inside Mahabharata Mahabharata, Book 3, Chapter 277 Behold my plight! The loss of thy kingdom, and then the death of our father, and then the abduction of Sita, and finally this disaster that hath overwhelmed me! Alas, I shall not behold thee return with the princess of Videha to Kosala and seated on thy ancestral throne as the ruler of the entire Earth! They only that are fortunate will behold thy face, like unto the moon emerged from the clouds, after thy coronation bath in water sanctified with Kusa grass and fried paddy and black peas!’ And the intelligent Lakshmana uttered those and other lamentations in the same strain. Mahabharata, Book 3, Chapter 282 That descendant of Raghu, who ruleth at Kosala and whose renown hath spread over the whole world, sayeth unto thee these words suited to the occasion. Accept thou that message and act according to it. Vrihadvala or Brihadbala, the Ruler of Kosala Mahabharata, Book 5, Chapter 277 Bhishma rates the battle skills of every king who were to take part in the Kurukshetra War Endued with great impetus and prowess, king Vrihadvala, the ruler of the Kosalas, is, in my judgment, equal to one Ratha (a grade of battle-skill). Kosala King supported Duryodhana in the war Mahabharata, Book 5, Chapter 198 King Vrihadvala of Kosala, supported Duryodhana in the Kurukshetra War Then came Kritavarman at the head of his troops, and that mighty car-warrior, viz., the ruler of the Trigartas, and the king Duryodhana surrounded by his brothers, and Sala, and Bhurisravas, and Salya, and Vrihadratha, the ruler of the Kosalas. Mahabharata, Book 6, Chapter 16 And Suvala's son Shakuni, and Salya, Jayadratha and the two princes of Avanti named Vinda and Anuvinda, and the Kekeya brothers, and Sudakshina the ruler of the Kamvojas and Srutayudha the ruler