Al-Harith bin Malik bin Barsa' (may Allah be pleased with him) said: On the day of the Conquest of Makkah, the Messenger of Allah (peace and blessings be upon him) said: "No military expedition will be made against this place until the Day of Resurrection."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجزية / 18786