Have you not considered how Allah sets forth a parable of a good word (being) like a good tree, whose root is firm and whose branches are in heaven,

And the parable of an evil word is as an evil tree pulled up from the earth's surface; it has no stability.

And were every tree that is in the earth (made into) pens and the sea (to supply it with ink), with seven more seas to increase it, the words of Allah would not come to an end; surely Allah is Mighty, Wise.