It is narrated on the authority of Tamim ad-Dari that the Prophet (ﷺ) said:"The Religion is sincerity." We said, "To whom?" He said "To Allah, to His Book, To His Messenger, and to the leaders of the Muslims and their masses

Muhammad b. Hatim and others narrate the same hadith of the Apostle (may peace and blessings be upon him) on the authority of Tamim ad-Dari

Umayya b. Bistam narrates the same hadith of the Messenger of Allah (may peace and blessings be upon him) on the authority of Tamim ad-Dari