Abu Dawud

Benefits and Issues:
Benefit: From these blessed hadiths, it is established that arranging, accepting, and attending Islamic (shar‘i) invitations is an extremely emphasized act.
Without exception as to who the inviter is, therefore, without a valid Islamic excuse, abstaining from them is absolutely not permissible.
This, in one sense, is counted as arrogance.
Likewise, accepting the invitations of the wealthy and turning away from the poor is also a major flaw.
Furthermore, an important condition is that in these invitations, adherence to Islamic matters and etiquettes, the expression of brotherhood and Islamic love, and honoring Muslims should be the objective; ostentation, seeking fame, gathering only the wealthy and influential, and not giving importance to the poor—
Extravagance, wastefulness, and other Islamic violations make such invitations disliked (makruh),
in which participation is not permissible.
In addition, the one participating in such an invitation should not make mere enjoyment of food and drink his sole objective.

Hadith Commentary:
Benefits and Issues:
Generally, the poor and needy, or those in need and necessity, accept invitations eagerly and willingly without making excuses or seeking pretexts.
However, they are often overlooked.
On the other hand, people of wealth and affluence avoid accepting invitations, display airs and affectations about attending, and even consider their presence to be a favor upon others.
Yet, they are persistently invited.
Whereas, the demand of Islamic brotherhood and good character is that, if there is no element of sin, innovation, or superstition in the invitation, then it should be accepted in every case. If the invitation is for the sake of ostentation, fame, self-praise, or reputation, or if one is invited for some ulterior motive, or if there is any Shari‘ah objection, then one should not attend.

Benefit:
In this hadith, “those who are prevented from the invitation” refers to poor people, because they wait for occasions like weddings, hoping for the opportunity to eat to their fill. On the occasion of marriage, the poor people of the neighborhood should also be invited. And in this hadith, “those who do not wish to attend the invitation” refers to wealthy people, because the rich regularly eat various luxurious foods in their homes and do not have any particular eagerness for invitations such as wedding feasts (walimah), etc. Furthermore, this hadith proves that accepting an invitation is obligatory, even if one eats only a single morsel.