The evils of the tongue and its cure

1. To make futile speech 
2. To speak more than necessity. 
3. To narrate non-sensual tales of sinners and wrong-doers. 
4. To debate 
5. To fight 
6. To swear 
7. To be foul-mouthed and to utter disrespectful words to elders 
8. To curse- this habit is found greatly in women. 
9. To sing songs and poems contrary to the Shari’at 
10. To laugh over the limit. 
11. To speak belittling words 
12. To expose someone’s secret 
13. To make false promises 
14. To speak lies. However, if one lies to make peace between two Muslims or if an oppressed person speaks lies so that he can receive his right, then this is permissible. 
15. To back-bite- this means to speak in someone’s absence such words that if he was present he would feel bad, even if it is true. This action is forbidden. The good actions of those who backbite will be snatched away and given to the other person. 
16. To carry tales 
17. To praise or flatter someone in his presence. However, if there is no fear of greatness entering his heart by your praises, but rather his spirits will raise to do good actions, then there is no harm. 
18. Not to be concerned of finer errors in one’s speech (e.g. many people say, “Hazrat, whatever dua emerged from your mouth will definitely be accepted, or above Allah below, you are our support.” All of this type of speech is shirk (polytheism). 
19. For the general public to ask the Ulama such questions which have no relationship with their necessities waste their time in futile and unnecessary questions. 

Cure 
The cure for all the ailments of the tongue is that one should always think before speaking. Whatever I want to say, will my Master and Sustainer be happy with it or not? If the thought comes that he will be happy, then speak, and if there is fear that he will be displeased, then remain silent. Shaikh Sa’adi (Rahmatullah Alaihe) has said, “Do not speak without speaking, even if you have to keep quiet for a while. So what sorrow can there be that after keeping quiet for a while, you then speak beneficial speech?