It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "When you are invited, then accept the invitation of the one who invites you." The narrator said: And Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) used to attend both wedding and non-wedding invitations, even when he was fasting, he would still attend the invitation.