Nasiha

Tamim ad-Dari said that the Messenger of Allah said, "The deen is nasiha (good counsel/ sincere conduct). The deen is nasiha. The deen is nasiha." They asked, "To whom, Messenger of Allah?" He said, "To Allah and His Book and His Messenger and the Imams and the common people."

What is the meaning of nasiha?

Imam Abu Sulayman al-Busti said, "Nasiha is a word used to designate the desire for what is good for the one who is its object, and it is not possible to explain it with a single word which will contain it all."

Abu Bakr ibn Abi Ishaq said, "Nasiha is doing something which contains rightness and harmony. It comes from nisah which is the thread with which garment are sewn."

Nasiha to Allah : having sound belief in His Oneness, describing Him in the way He deserves to be described and disconnecting Him from what cannot be attributed to Him. It is desire for what He loves and distance from what He hates and sincerity in worshipping Him.

Nasiha to His Book : belief in it, acting according to it, reciting it well, humility with it, esteem for it, understanding it and seeking fiqh in it and protecting it from the interpretation of the extremists and the attack of heretics.

Nasiha to Prophet Muhammad : confirming his prophethood and obeying him in what he commands and forbids. Respect and love him and persevering in learning his sunna.

Nasiha to the Imams : obey them when they command to the truth, help them, command them to the truth, inform them about what they have overlooked and not to attack them nor cause trouble and dissension for them with people and not alienate them from people.

Nasiha for the sake of the common Muslims : guide them to their best interests, help them in the business of their deen and this world by word and action, warning those of them who are heedless, enlightening the ignorant, giving to those in need, veiling their faults, and repelling what will harm them and bringing what will benefit them.

Source: Book - Muhammad Messenger of Allah, Ash-Shifa of Qadi ' Iyad