Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: "In the Days of Ignorance we used to call a person an 'imma'ah' who would go to a meal without being invited. Indeed, the imma'ah among you is the one who loads his religion onto the backs of others."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8734