al-Moulakhas al-Fiqhi - Salih Al-Fawzan - (2/366)

The invitee must be singled out; the host must designate him personally, and the call must not be a general, open invitation.
No sinful activity may take place at the walīmah, such as serving wine, playing songs with flutes and pipes, or hiring professional singers and musicians—practices that, regrettably, are found at some banquets today.

When these conditions are met, attending becomes obligatory, for the Prophet ﷺ said, “The worst food is the food of a wedding feast: those who would come are kept away from it, while those who would refuse are invited. Whoever fails to attend has disobeyed Allah and His Messenger,” reported by Muslim.

It is recommended to publicize the marriage—that is, to make it known and widely announced—because the Prophet ﷺ said, “Announce the marriage,” and in another wording, “Make the marriage public,” narrated by Ibn Mājah.

It is also recommended to beat the daf on such occasions, for the Prophet ﷺ said, “The marker that sets the lawful apart from the unlawful is the sound of the voice and the daf at a wedding,” narrated by al-Nasāʾī, Aḥmad, and al-Tirmidhī, who graded it sound.

الشرط الرابع: أن يعيّنه الداعي بالدعوة ويخصه؛ بأن لا تكون الدعوة عامة. الشرط الخامس: أن لا يكون في الوليمة منكر؛ كخمر وأغان ومزامير ومطربين؛ كما يحصل في بعض الولائم في هذا الوقت. فإذا توفرت هذه الشروط وجبت إجابة الدعوة؛ لقوله ﷺ: "شر الطعام طعام الوليمة، يمنعها من يأتيها، ويدعى إليها من يأباها ومن لا يجب؛ فقد عصى الله ورسوله"، رواه مسلم. ويسن إعلان النكاح أي: إظهاره وإشاعته؛ لقوله ﷺ: "أعلنوا النكاح"، وفي لفظ: "أظهروا النكاح"، رواه ابن ماجه. ويسن الضرب عليه بالدف؛ لقوله ﷺ: "فصل ما بين الحلال والحرام الصوت والدف في النكاح"، رواه النسائي وأحمد والترمذي وحسنه.