Dushala was King Dhritrashtra and Queen Gandhari’s daughter and sister to Kauravas in the Indian epic Mahabharata. She was married to Jayadratha the king of Sindhu and Sauvira. All the Pandavas considered Duhsala as their own sister. Dushala also always considered Pandavas as her own brothers.

Jayadratha was slain by Arjuna in the Kurukshetra War. Dussala had a son named Suratha. Her grandson battled with Arjuna, when he came to the country of Sindhus after the Kurukshetra War, to collect tribute for Yudhisthira’s Aswamedha sacrifice. Due to his love for his sister; Arjuna spared the life of Suratha’s son and left the country of Sindhus.

source: https://en.wikipedia.org/wiki/Duhsala