It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that in the year of the Conquest of Makkah he (peace and blessings be upon him) stood up and said: "Allah held back the elephant from Makkah and gave His Messenger and the believers authority over it. It was not lawful for anyone before me, nor will it be for anyone after me; it was made lawful for me only for an hour of the day, and this is that hour of mine."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9843