In Jainism, Rishabhanatha (Rishabha) is honored as the first Tirthankar, the proto‑teacher of the path to liberation. There isn’t a specific “Vedic mantra” about Rishabha in Jain scriptures, because Jains do not derive their main mantras from the Vedas. Instead, Jains use their own devotional formulas and stotras that praise the Tirthankaras and the path they taught.

Key points you may find helpful:

• Rishabhanatha is a central figure in Jain cosmology and spiritual lineage, but Vedic mantras are not part of Jain devotional practice.
• The most common Jain reverential formula is the Namokar Mantra, which honors the 24 Tirthankaras collectively (not a single Rishabha‑specific mantra). It is widely recited in Jain practice.
• If you are looking for texts that explicitly praise Rishabha within Jain literature, these appear in Jain siddhāntic works and stotras dedicated to the Tirthankaras, rather than in Vedic mantras.

If you’d like, I can provide the exact Jain text for a Rishabha‑focused stotra or point you to a Jain canonical source that discusses Rishabhanatha in detail.