Bulugh al-MaramChapter 8Hadith 1210
Full Sharh — Bulugh al-Maram 1210
وَلِمُسْلِمٍ : { إِذَا دَعَا أَحَدُكُمْ أَخَاهُ , فَلْيُجِبْ; عُرْسًا كَانَ أَوْ نَحْوَهُ } 1 .1 - مسلم برقم (1429) (100).
English Translation
Muslims has:: "When one of you invites his brother, he must respond (i.e. attend), whether it is a wedding or something similar."
Source
Bulugh al-Maram(بلوغ المرام)
Marriage
Hadith Number
1210