It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Indeed, Islam began as something strange, and it will soon become strange again just as it began; so glad tidings to the strangers." The Companions (may Allah be pleased with them) said: "O Messenger of Allah! Who are those strangers?" He (peace and blessings be upon him) said: "Those who set things right when the people have become corrupt."
Hadith Referenceالمعجم الأوسط / باب الميم / 8977
Hadith Takhrij«أخرجه الطحاوي فى «شرح مشكل الآثار» برقم: 689، والطبراني فى «الأوسط» برقم: 4915، 8716»