Do not talk too much without remembrance of Allah
Ibn 'Umar, may Allah be pleased with him, narrated that the Messenger of Allah (may the peace and blessings of Allah be upon him) said:
"Do not talk too much without remembrance of Allah. Indeed excessive talking without remembrance of Allah hardens the heart. And indeed the furthest of people from Allah is the harsh-hearted."
The Messenger of Allah - may the peace and blessings of Allah be upon him - recommends in this Hadeeth not to speak unless our words is mixed with the remembrance of Allah. Then if we are to talk about something, we should not talk too much, but we should suffice with what meets the need. As the saying goes the balance of reason is to talk briefly.
The Prophet (may the peace and blessings of Allah be upon him) disliked speaking without mentioning Allah as it causes the cruelty of the heart in the sense that the idle talk leads to the rudeness, bad behaviors and the darkness of the heart.
Once the heart is covered with darkness, it will be corrupt then one will be the farthest of people from Allah.
The words of the righteous are based on mentioning Allah, because it is devoid of the idle talk, they are far away from the unbeneficial words, for they preoccupied themselves with the truth.
Please keep in mind that if you did not preoccupy yourself with the truth, it will preoccupy you with the falsehood.
It is said: "May Allah have mercy on a man who speaks good so that he earns the reward, or that he keeps silent to remain safe."
It is a piece of wisdom: He who speaks so much, will incur too much faults.