Sayyiduna Abdullah bin Umar (may Allah be pleased with them) narrates that the Prophet Muhammad (peace and blessings be upon him) said: "When you are invited, then go to the invitation."
Hadith Referenceصحیح ابن حبان / كتاب الأطعمة / 5289
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «الإرواء» (7/ 5 / 1948): ق.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط الشيخين
It is narrated about Sayyiduna Abdullah bin Umar (may Allah be pleased with them both): When he was invited, he would attend the invitation. If he was fasting, he would make a supplication for blessing and return, and if he was not fasting, he would stay there and eat the food. Nafi’ narrates: Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) stated that the Prophet Muhammad (peace and blessings be upon him) said: "When you are invited to a meal (food), then accept it."
Hadith Referenceصحیح ابن حبان / كتاب الأطعمة / 5290
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح الإسناد - «الإرواء» (1947): ق نحوه.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط مسلم