Simandhar Bhagwan is a Tirthankara currently residing in Mahavideh Kshetra according to Jain cosmology. In Jain tradition, especially among some sects, devotees remember Simandhar Bhagwan during pratikraman or other devotional activities.

Duha (દોહા) are devotional couplets or verses recited in praise of deities or Tirthankaras. During pratikraman, specific duha may be recited to remember and pay homage to Simandhar Bhagwan.

Here are two commonly recited duha in honor of Simandhar Bhagwan:

1. ``` Simandhar Swami prabhu, param dayaalu chhe, Bhavjal tarva ne, ekmatra naathu chhe. ``` Translation: Lord Simandhar Swami is supremely compassionate, He is the only refuge to cross the ocean of worldly existence.

2. ``` Arihant Simandhar Swami, anant gunon ni khan, Bhakti karu tamari, karo mope kalyan. ``` Translation: Arihant Simandhar Swami, a mine of infinite virtues, I offer my devotion to you, please grant me liberation.

These duha can be recited with devotion during pratikraman or any time you wish to remember and pay respect to Simandhar Bhagwan.

Note: The exact wording of duha may vary among different Jain communities and languages. If your tradition or sect has specific duha, you may refer to your pratikraman book or local Jain center for the most authentic versions.