Answer

In Jain Snatra Pujā, the 56 Dikkumārīs tie a Raksha Potli or Rakhadi — a protective red thread/bundle — on the Tirthankar’s wrist or hand. It is a symbolic act of protection and auspiciousness. ( jainpedia.org)

Explanation

The 56 Dikkumārīs are described in Jain tradition as attendants who come to serve at a newborn Jina’s birth rites. Their role includes cleansing, decoration, and protective ceremonial acts, and the raksha potli is tied as part of that service. ( jainpedia.org)

Takeaway

So, they tie a protective auspicious thread/bundle — not an ordinary thread — as part of the sacred birth ceremony. ( jainfoundation.in)