Answer

A commonly used Jain mantra for Gautam Labdhi / Gautam Swami mala jaap is:

“Om Rhim Arihant Uvajjhaay Shri Gautaum Swami Namah!”

Some Jain community resources also use:

“Shri Gautaum Swami Sarvagnaay Namah!” ( oshwal.org.uk)

Explanation

These forms are used in Gautam Swami devotion and mala jaap guidance within Jain practice. The exact wording can vary a little by tradition, but both mantras are centered on श्रद्धા for Shri Gautam Swami. ( oshwal.org.uk)

Spiritual Understanding

In Jain tradition, Shri Gautam Swami is revered as Mahavir Swami’s chief disciple and the first Guru of the Jain order, so his naam-smaran and mala jaap are considered very auspicious. ( oshwal.org.uk)

Takeaway

If you want the simplest form, use: “Om Rhim Arihant Uvajjhaay Shri Gautaum Swami Namah!” ( oshwal.org.uk)