It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) was asked about it on the day of Arafah, and he (peace and blessings be upon him) said: "It is a right," meaning the atirah (the particular sacrifice of the month of Rajab).
No one but Sufyan (may Allah have mercy on him) narrated this hadith from Zayd bin Aslam (may Allah have mercy on him), and no one but Muhammad bin Abi Umar al-Adani (may Allah have mercy on him) narrated it from Sufyan (may Allah have mercy on him).
Hadith Referenceالمعجم الأوسط / باب الميم / 6230
Hadith Gradingمحدثین:منكر بهذا الإسناد
Hadith Takhrij«قال أبو حاتم الرازي: حديث منكر يعني بهذا الإسناد «علل الحديث، ج 4، ص 521»»