Kichakavadha Parva is the forty sixth upa parva included in the fourth maha parva, named as Virata parva, in the epic Mahabharata. The original epic was composed by Vyasa in Sanskrit. Vyshampayana had narrated the historical events that had happened during the Ajnatavasa of Pandavas to Janamejaya on his queries.
Where did Pandava brothers had lived during Ajnatavasa?
Yudhishtira lived with king Virata. He used to advise the king in administration, performed the morning rituals and played dice game as and when the king required. Hence Yudhishtira was not exposed to the general public in Matsya.
Bhima lived with royal cooks. He used to cook for the king in the kitchen, and played wrestling as and when the king required. Hence Bhima was not exposed to the general public in Matsya.

Arjuna lived with the daughter of the king Virata, as a teacher. Her name was Uttara and she was interested in learning dance and music. King Virata had built a building for dancing practice workshop, like a school, along with practicing music and related items for his daughter Uttara.
यदिदं नर्तनागारं मत्स्य राजेन कारितं । दिवात्र कन्या नृत्यन्ति रात्रौ यान्ति यथा गृहं ॥
Meaning: This building for dancing workshop was built by the Matsya king. In the day times, girls used to practice dancing here and in the night, they returned to their homes.
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