The socio-religious customs like birth and death ceremonies among Newar community was leading to indebtedness. The priests took up huge ceremonial fees and failure to adhere to such customs led people to excommunication in the Newar society. In 1830–31, Bhimsen by issuing "Lalmohar", a regulation was introduced with a limit of ceremonial fees and the amount of expenditure was restricted. The children of debtors were acquired by the traders against the accumulated interest of the loans and were sold on profit. The feudal lords did not allow them legal facilities and considered slaves as non-human. Bhimsen challenged the widespread notion of inhuman treatment of slaves. In 1830, Bhimsen having introduced anti-slavery regulations beforehand in 1807, restricted all of the Danuwar traders in Western Nepal to acquire and sell "Kariya" slaves and also freed slaves from the custody of their owner. The regulation was targeted to provide legal rights to slaves and boost their morale. Six years afterward, he restricted ban on sales of children prevalent among Magar community of Marsyangdi and Western Pyuthan. The slave trading was made illegal on various parts of Nepal by Bhimsen. It was considered one of the greatest achievement in the history on comparison to their British counterparts. Wilberforce in England was obtaining the public mandate against it while one of the most powerful Prime Minister in the world (in the 1800s) – William Pitt was hesitant to outlaw the slave trading.