Answer

In Jain tradition, raksha potli is generally understood as a small sacred red thread or pouch tied after certain puja, havan, or special vidhi. In Jain wedding ceremonies, it is described as a sacred red thread prepared and blessed before the wedding day and tied on the wrists as a prayer for peace and protection. ( jainknowledge.com)

Explanation

As for its exact origin, the Jain sources I found do not point to a specific Agamic or scriptural beginning. Based on the available Jain ritual material, it appears to be a later customary practice used in community ceremonies, especially weddings, rather than a central canonical Jain rite. This is an inference from how it is described in modern Jain wedding booklets and in JainFoundation material that mentions asking a sadhu for raksha potli for worldly reasons. ( jainqq.org)

Spiritual Understanding

In Jain understanding, the raksha potli is only a symbolic aid. The deeper protection comes from right faith, right knowledge, right conduct, and the purification of one’s own karma. So the potli is a reminder of dharma and auspiciousness, not a substitute for inner spiritual practice. ( jainknowledge.com)

Takeaway

So, if you mean “where did Jain raksha potli come from?”, the safest answer is: it developed as a devotional and customary Jain practice, especially in marriage and special rituals, and is used as a blessed symbol of protection and peace. ( jainqq.org)