What is the ruling on one who attends a wedding feast without being invited to it?

A "parasite" (Tufayli) is someone who intrudes upon people without being invited. The jurists have explicitly stated that this act is forbidden. It is the act of entering another's place to eat their food without their permission or knowledge of their consent. If it recurs, it leads to one being considered a transgressor (fasiq). The jurisprudential schools have unanimously agreed on the impermissibility of attending another's meal without an invitation or knowledge of their consent.