You likely mean “Dev–Guru prasād” (sometimes said in speech as “Dev Guru prasad/prasay”). In simple Jain terms:

• Dev = the worthy ones we revere, primarily Arihant and Siddha (not heavenly devas for favors).
• Guru = the living guides of the path: Āchārya, Upādhyāy, and Sādhu.
• Prasād = their “blessing” in the sense of inner serenity and inspiration, not a gift that removes karma. In Jain Dharma, liberation comes only through one’s own right faith, right knowledge, and right conduct; the reverence to Dev and Guru inspires that self‑effort.

Across traditions:

• Shvetāmbars and Digambars both honor Dev–Shāstra–Guru.
• In Digambar practice, “Dev–Shāstra–Guru Pūjā” is commonly performed first; Shvetāmbars equally revere this triad while emphasizing salutation to the Pañcha‑Parameṣṭhī (Namokār Mantra). The meaning above remains the same in both.

So “Dev–Guru prasād” essentially means: with the serene blessing and inspiration of the Worthy Ones (Dev) and the true Teachers (Guru), may I progress on the Jain path through my own effort.

For a short note on “Dev” and “Guru” in Jainism, see this reference from JainKnowledge: