Rishabnath is widely recognized as the first Tirthankar in Jain tradition.
According to traditional Jain religious sources and scriptures, the first Tirthankar, Rishabnath, is associated with the ancient region of Kosala.
He belonged to the renowned Ikshvaku dynasty, with Ayodhya, located within Kosala, often cited as his ancestral seat.
Thus, Kosala is identified as the place Rishabnath belongs to, based on these religious accounts.