Hadhrat Abdullah ibn Umar (Radiyallahu anhu) narrates that the Holy Prophet (صلى الله عليه وسلم) said:
“The person who is invited amongst you by his brother should accept the invitation whether it is a wedding invitation or anything similar to it.” [Muslim]

Hadhrat Jabir ibn Abdullah (Radiallahu anhu) narrates that the Holy Prophet (صلى الله عليه وسلم) said:
“If anyone of you is invited to partake of meals, he should at least accept the invitation. Thereafter he may partake of it if he desires or he may totally abstain from it.” [Muslim]

Hadhrat Abu Hurairah (Radiallahu anhu) narrates that the Holy Prophet (صلى الله عليه وسلم) said:
“If anyone of you is invited for meals, he should accept the invitation. If he is fasting, he should make Duaa (of goodness and blessing) for the person who has invited (some maintain that he should set out and perform salaah at the host’s house), and if he is not fasting he should partake of the meal.” [Muslim]

No excuse will be entertained in declining an invitation. However, if wine and other intoxicants are provided at the invitation or food will be eaten out of gold and silver utensils or there is a fear of any other evil, one should on no account accept the invitation.