In The Name Of Allah Most Gracious Most Merciful
Assalaamu Alaykum Wa Rahmatuallahi wa barakatuhu
Abu Hurairah (Radhiallahu anhu) who said that Allah's Messenger (Sallallahu alaihi wasallam) said, "The trustworthy ones in every generation will carry this knowledge. They will remove from it the distortions of the excessive ones, the false claims of the liars and the false interpretations of the ignorant people." [Takhreej: Majmoo al-Fatawa of Ibn Taymiyyah (15/298), ar-Rawd al-Basim of Ibn al-Wazeer al-Yamaani(1/21-23),Takhreej ul-Mishkaat of al-Albanee(1/82-83, no.248),Hadiyy] (Thahdheeb Sharaf Ashaabul-Hadeeth of al-Khateeb al-Baghdaadee [p.57-58])
When a word is spoken, it has taken control of him; but when it is not spoken, he is in control of it."
"The tongue of the intelligent is behind his heart: when he wishes to speak he first refers to the heart and if it is befitting that he speak, he does, otherwise he does not. The heart of the ignoramus is on the tip of his tongue: whatever comes to it, he speaks. The one who does not preserve his tongue has not understood his religion."
[Taken from: Rifqan Ahlus-Sunnah bi Ahlis-Sunnah by Shaykh `Abdul-Muhsin al-`Abbaad in which he quotes from Imaam ibn Hibaan and his book "Rawdat-ul-`Uqalaa wa Nuzhat-ul-Fudalaa"]
We should only speak when we know there is benefit in it.And the benefit over powers the harm from it.
"...Many times, I have regretted speaking, my son, but I have never regretted remaining silent." ~ Luqman
Imaam Abu Haatim ibn Hibban (d.354H) (Rahimahullâh) said:
"It is obligatory upon the intelligent to adhere resolutely to silence until he must speak. Frequently will the one who speaks later regret! Rare will it be that the one who remains silent have a cause to regret! The people who will have the most misery and greatest misfortune are those with unrestrained tongues and encased hearts."
"It is obligatory upon the intelligent to treat his ears and mouth fairly. He should know that he was given two ears and one mouth so that he may listen more than he speaks, for it may well be that when he speaks, he will regret, and when he does not speak, he will have no cause to regret. Man is more able to return to its place what he did not say as compared to returning and retracting what he has actually said. we have to realize what Prophet Sallallahu alayhi wasallam said about such situation,O People, no prophet or apostle will come after me, and no new faith will be born. Reason well, therefore, O People, and understand my words which I convey to you. I leave behind me two things, the Qur'an and my Sunnah and if you follow these you will never go astray.
Abu 'Abdillaah Ibn Battah (rahimahullaah) said: "I heard Abu Muhammad Al-Barbahaaree say: 'Sitting in order to advise sincerely is to open the door of benefit and sitting in order to debate is to close the doors of benefit.'"
Imâm Al-Hasan Al-Basrî (Rahimahullâh) Said,”The wise man does not argue or seek to overcome with stratagem rather he propagates his wisdom. If it is accepted he praises Allaah and if it is rejected he praises Allaah”
Allah knows best