if one of you invites his brother, he should accept(the invitation), whether it is a wedding feast or something of that nature.
Sunan Abi Dawud Book 28, Hadith 3
← Previous Hadith If he is not fasting, he should eat, and if he is fasting, he should leave it.

Sunan Abi Dawud Book 28, Hadith 2 Next Hadith → The tradition mentioned above has also been transmitted by Nafi’ to the same effect through the chain of narrators as mentioned in Ayyub.

Sunan Abi Dawud Book 28, Hadith 4