It is narrated from Sayyiduna Abu Umamah al-Bahili (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "A group of my Ummah will remain upon the truth, prevailing; they will prevail over whoever fights them, dominant; whoever opposes them will not be able to harm them, until the command of Allah comes to them while they are in that state." It was said: "O Messenger of Allah, where will they be?" He said: "In Bayt al-Maqdis."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7612