Sayyiduna Anas bin Malik (may Allah be pleased with him) said: When we returned from al-Hudaybiyah, the Companions of Muhammad (peace and blessings be upon him) were overcome by grief and sorrow, because they had slaughtered their sacrifices in their places. Then the Messenger of Allah (peace and blessings be upon him) said: "A verse has been revealed to me that is dearer to me than the whole world." And he mentioned the (rest of the) hadith.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10085