Sayyiduna Ibn Umar (may Allah be pleased with them both) said: The Messenger of Allah (peace and blessings be upon him) said: "When any of you is invited to a wedding feast, he should accept the invitation" (that is, he must go to it). Imam Darimi (may Allah have mercy on him) said: He should accept the invitation, but eating the food is not obligatory for him.
Hadith Referenceسنن دارمي / من كتاب النكاح / 2242
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده صحيح والحديث متفق عليه، [مكتبه الشامله نمبر: 2251]
Hadith Takhrijاس روایت کی سند صحیح اور حدیث متفق علیہ ہے۔ دیکھئے: [بخاري 5173] ، [مسلم 1429] ، [أبوداؤد 3736] ، [ابن حبان 5294]