The Jain granth you are referring to is Chhota Niyam Chandni (also spelled "Chhota Niyam Chandani").

This is a small text containing rules and guidelines (niyam) for daily conduct, often used by Jain laypeople (Shravaks and Shravikas). The word "Chhota" means small or concise, "Niyam" means rules, and "Chandni" here refers to a concise booklet or selection. This granth is popular among the Jain community, especially for those seeking a brief and accessible summary of key ethical practices.