SINCERITY IN ISLAM
On the authority of Tamim Al-Dari (may Allah be pleased with him):
The Prophet (peace be upon him) said, “The religion is naseehah (sincerity).” We said, “To whom?” He (peace be upon him) said, “To Allah, His Book, His Messenger, and to the leaders of the Muslims and their common folk.”
[Muslim]
عَنْ أَبِي رُقَيَّةَ تَمِيمِ بْنِ أَوْسٍ الدَّارِيِّ رَضِيَ اللهُ عَنْهُ أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ:
“الدِّينُ النَّصِيحَةُ.” قُلْنَا: لِمَنْ؟ قَالَ: “لِلَّهِ، وَلِكِتَابِهِ، وَلِرَسُولِهِ، وَلِأَئِمَّةِ الْمُسْلِمِينَ وَعَامَّتِهِمْ.”
[رَوَاهُ مُسْلِمٌ]