When doing pradakshina in a Jain temple, the most common mantra recited is:

Namo Arihantāṇam Namo Siddhāṇam Namo Ayariyāṇam Namo Uvajjhāyāṇam Namo Loe Savva-sāhūṇam

This is the Navkar Mantra, the most sacred mantra in Jain Dharma.

Many also silently remember:

• Arihant
• Siddha
• Acharya
• Upadhyaya
• Sadhu

During pradakshina, the feeling should be of bhakti, reverence, and inner purity, not just the words.