It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Allah, the Mighty and Majestic, has three sanctities. Whoever safeguards them, Allah safeguards for him the affairs of his religion and his world; and whoever does not safeguard them, Allah does not safeguard anything for him: the sanctity of Islam, my sanctity, and the sanctity of my kin."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 2868