In Jainism, when performing "1st Bhagwan ekashana" (a type of devotional practice or vrata involving taking a single meal in reverence to the first Tirthankara, Lord Rishabhanatha/Adinath), there is no universally mandated mala (prayer beads) specified in Jain scriptures exclusively for this practice. However, Jains commonly use malas for counting recitations of mantras, prayers, or for meditation.

Common Practices:

• Navkar Mala: Most Jains use a mala with 108 beads (Navkar mala) to recite the Navkar Mantra or other prayers. This is suitable and auspicious for use during any Jain devotional activity, including ekashana.
• Rudraksha or Tulsi Mala: Some Jains, especially among the Shwetambar sect, may use white beads or tulsi (holy basil) malas; Digambar Jains sometimes use rudraksha malas. There is no scriptural restriction, as long as the mala is used with devotion and purity.

Recommendation: For "1st Bhagwan ekashana," you can use a regular 108-bead Jain Navkar mala to keep count of mantra recitations or prayers. The focus should be on devotion, purity of intent, and following the proper procedure of the vrata.

Note: If you follow a particular Jain tradition or sect, you may consult your guru or local temple for any specific recommendations as customs can vary.

Summary: You may use a 108-bead Navkar mala or any clean, simple mala for counting during 1st Bhagwan ekashana. There is no strict rule in Jain scriptures specifying a particular mala for this purpose.