English Translation
Narrated Nafi': Abdullah bin 'Umar said, "Allah's Apostle said, 'Accept the marriage invitation if you are invited to it.' " Ibn 'Umar used to accept the invitation whether to a wedding banquet or to any other party, even when he was fasting.
This hadith is from Sahih al-Bukhari, the most rigorously authenticated collection in Islamic scholarship. No editorial opinion is added.