Is it permissible to publicize a true dream related to the virtue of a supplication or act of worship, with the intention of encouraging people to perform it, knowing that scholars advise against narrating dreams except to those one trusts, for fear of envy and the evil eye?

It is not permissible to consider a specific supplication (du'a) a part of the religion or a regular litany (wird) based on a dream, for legal rulings are not established by dreams. It is recommended not to disclose a dream except to one whom you love, but it can be narrated in the third person to demonstrate its benefit. Scholars have mentioned stories of dreams that confirm what is already established in Islamic law. However, publishing a dream online and stating that you saw it contradicts the Prophet's (peace be upon him) directive not to disclose a beloved dream except to one whom you love.