The phrase "Rath mae vithragi" and the mention of "Antagad Sutra" are both rooted in Jainism.

"Rath mae vithragi" can be interpreted as "the passionless one in the chariot," symbolizing a soul that has risen above worldly attachments and passions while still living in the body (likened to a chariot). This reflects the Jain ideal of living in the world but not being of the world, maintaining detachment (vitaraga) amidst all activities.

Antagad Sutra (also spelled as "Antakrddasha Sutra") is one of the Jain Agamas (canonical scriptures) recognized by the Śvetāmbara sect. It is the eighth Anga (limb) among the twelve canonical Angas. The Antagad Sutra contains stories of 90 individuals who attained liberation (moksha) by destroying their karmas while still alive and thus became "Antakrit" (those who have ended the cycle of birth and death).

These stories serve as inspirations for Jain followers, showing that it is possible to achieve liberation through steadfastness, renunciation, and the practice of vitaraga (detachment from passions).

If you are looking for a specific story or verse from the Antagad Sutra that illustrates the concept of "vithragi" (detachment), please let me know, and I can provide more details or an example from the Sutra.