A more thorough explanation:

DE NON PROCEDENDO AD ASSISAM

De non procedendo ad assisam is a legal term in Latin that means "of not proceeding to take an assize." It refers to a writ that orders justices not to hold an assize in a particular case.

An example of de non procedendo ad assisam would be if a plaintiff filed a lawsuit against a defendant, but the defendant argued that the case should not go to trial because the plaintiff did not have a valid claim. The defendant could request a writ of de non procedendo ad assisam to prevent the case from going to trial until the issue of the plaintiff's claim was resolved.

Another example would be if a landlord filed a lawsuit against a tenant for non-payment of rent, but the tenant argued that the landlord had not properly maintained the property. The tenant could request a writ of de non procedendo ad assisam to prevent the case from going to trial until the issue of the property's maintenance was resolved.

These examples illustrate how a writ of de non procedendo ad assisam can be used to prevent a trial from proceeding until a particular issue is resolved. It allows the parties involved to address any potential issues before the case goes to trial, which can save time and resources.