Imaam Ibn Qudaamah Al-Maqdisee (rahimahullaah) said:

Know that whoever is acquainted with the worth of his era and that it is his main capital, he will not seek an understanding except in what is beneficial; and this acquaintance obligates restraining one’s tongue from speaking about that which does not concern him—for indeed the one who abandons the remembrance of Allaah (The Most High) and busies himself with what does not concern him, then he is like one who is able to get hold of a gem but exchanges it for a clod of earth.  This is a loss of one’s lifespan. [‘Mukhtasar Minhaaj Al-Qaasideen’ page 176]