It is narrated from Sayyiduna Buraydah (may Allah be pleased with him), in a report attributed to the Prophet, that he (peace and blessings be upon him) said: "Al-Samad is the One who has no hollow interior."
It is narrated from Sayyiduna Tamim al-Dari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Indeed the religion is sincere goodwill, indeed the religion is sincere goodwill, indeed the religion is sincere goodwill." The Companions said: "To whom, O Messenger of Allah?" He (peace and blessings be upon him) said: "To Allah, to His Book, to His Messenger, to the leaders of the Muslims, and to their community."
Sayyiduna Tamim al-Dari (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "The religion is sincere goodwill." The Companions said: "To whom, O Messenger of Allah?" He (peace and blessings be upon him) said: "To Allah, to His Book, to His Messenger, to the leaders of the Muslims, and to the Muslims in general."
Hadith Referenceالمعجم الكبير للطبراني / باب التاء / 1252