On the recommendation to speak good words and display a cheerful face when you meet someone

Riyad as-Salihin (The Meadows of the Righteous)

by Imam Nawawi

88. Chapter: On the recommendation to speak good words and display a cheerful face when you meet someone

Allah Almighty says, "And take the believers under your wing," (15:88)

and the Almighty says, "If you had been rough or hard of heart, they would have scattered from around you." (3:159)

693. 'Adi ibn Hatim reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "Protect yourselves from the Fire, even if with only half a date. If you cannot manage even that, then with a good word." [Agreed upon]

694. Abu Hurayra reported that the Prophet, may Allah bless him and grant him peace, said, "A good word is sadaqa." [Agreed upon]

695. Abu Dharr said, "The Messenger of Allah, may Allah bless him and grant him peace, said to me, "Do not think little of anything which is right, even just showing your brother a cheerful face. [Muslim]