It is narrated from Sayyiduna Abu Malik al-Ash'ari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "You are an Ummah that has been shown mercy and granted pardon, so remain steadfast and take up the matter of the religion to the extent of your ability."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3448