along with placing a kasrah on the final nūn when the word is treated as dual, and the opposite when it is taken as plural; both pronunciations are acceptable.
22 – Chapter on Sincere Counsel
Allah the Exalted says, “The believers are but brothers.” ⦗Al-Ḥujurāt 49:10⦘
He also says, conveying Noah’s words, “and I give you sincere counsel.” ⦗Al-Aʿrāf 7:62⦘
And He says about Hūd, peace be upon him, “I am to you a trustworthy counselor.” (1) ⦗Al-Aʿrāf 7:68⦘
As for the hadiths:
186 – First: Abū Ruqayyah Tamīm ibn Aws ad-Dārī (may Allah be pleased with him) reported that the Prophet ﷺ said, “Religion is sincere counsel.” (1) We asked, “For whom?” He answered, “For Allah, His Book, His Messenger, the leaders of the Muslims, and their common folk.” Narrated by Muslim.
187 – Second: Jarīr ibn ʿAbd Allah (may Allah be pleased with him) said, “I pledged allegiance to the Messenger of Allah ﷺ to establish the prayer, pay the zakah, and extend sincere counsel to every Muslim.” Agreed upon.
188 – Third: Anas (may Allah be pleased with him) reported that the Prophet ﷺ said, “None of you truly believes until he loves for his brother what he loves for himself.” Agreed upon.
23 – Chapter on Enjoining Right and Forbidding Wrong
Allah the Exalted says, “Let there arise from among you a community that calls to all that is good, enjoins what is right, and forbids what is wrong; it is they who will prosper.” ⦗Āl ʿImrān 3:104⦘
And He says: