Śukadeva Gosvāmī continued speaking to Mahārāja Parīkṣit: My dear King, the King of Koṅka, Veṅka and Kuṭaka whose name was Arhat, heard of the activities of Ṛṣabhadeva and, imitating Ṛṣabhadeva’s principles, introduced a new system of religion. Taking advantage of Kali-yuga, the age of sinful activity, King Arhat, being bewildered, gave up the Vedic principles, which are free from risk, and concocted a new system of religion opposed to the Vedas. That was the beginning of the Jain dharma. Many other so-called religions followed this atheistic system.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
यस्य किलानुचरितमुपाकर्ण्य कोङ्कवेङ्ककुटकानां राजार्हन्नामोपशिक्ष्य कलावधर्म उत्कृष्यमाणे भवितव्येन विमोहितः स्वधर्मपथमकुतोभयमपहाय कुपथपाखण्डमसमञ्जसं निजमनीषया मन्दः सम्प्रवर्तयिष्यते
yasya kilānucaritamupākarṇya koṅkaveṅkakuṭakānāṃ rājārhannāmopaśikṣya kalāvadharma utkṛṣyamāṇe bhavitavyena vimohitaḥ svadharmapathamakutobhayamapahāya kupathapākhaṇḍamasamañjasaṃ nijamanīṣayā mandaḥ sampravartayiṣyate
SB 5.6.9