The command to accept invitations
وَحَدَّثَنِي حَرْمَلَةُ بْنُ يَحْيَى، أَخْبَرَنَا ابْنُ وَهْبٍ، حَدَّثَنِي عُمَرُ بْنُ مُحَمَّدٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " إِذَا دُعِيتُمْ إِلَى كُرَاعٍ فَأَجِيبُوا " .
Ibn Umar (Allah be pleased with them) reported Allah's Messenger (ﷺ) having said: When you are invited to a feast (even though it is) the leg of the sheep, you should accept it.