In Jainism, the verse "Darshanam Deva-Devasya" is often recited upon entering a Jain temple or before having darshan (vision/audience) of the Tirthankara idols. This shloka expresses reverence and devotion towards the Tirthankaras, acknowledging their supreme qualities and seeking their blessings.

Specifically, it is customary to recite "Darshanam Deva-Devasya" during the following occasions:

• Upon entering the temple: As a mark of respect and to prepare oneself mentally and spiritually before beholding the idol of the Tirthankara.
• Before performing puja, aarti, or any temple rituals: To invoke the divine presence and seek purity of mind.
• During pilgrimage (yatra) to Jain temples: Pilgrims may recite this as they approach the sanctum sanctorum.

The verse goes as follows:

``` Darshanam Deva-Devasya, Darshanam Papanashanam, Darshanam Moksha Dwarasya, Darshanam Anandadayakam. ```

Meaning: "The sight of the Lord of Lords (Tirthankara) destroys all sins, opens the gate to liberation, and bestows bliss."

Thus, reciting this shloka is an act of devotion and respect, typically done whenever a devotee is about to have darshan of the Tirthankara in a Jain temple.