Rabee Bin Khuthaym [rahimahullaah] used to say:

There is no good in speech except in nine[affairs]: Tahleel [i.e. uttering Laa-ilaaha ilal-laah]; Takbeer [i.e. uttering Allaahu Akbar]; Tasbeeh [i.e. uttering Subhaanallaah]; Tahmeed [i.e. uttering Al-Hamdulil-laah]; Enquiring about good; Seeking refuge from evil; Enjoining good; Forbidding evil and Recitation of the Qur’aan’’.

[Source: ‘Kitaab As-Samt’ by Ibn Abee Dunyaa (rahimahullaah) page:246]