Good words

[14:24]

Did you not note how Allah puts forth the example that a good word is like a good tree, whose root is firm and whose branches are in the sky.

[14:25]

It bears its fruit every so often with the permission of its Lord; and Allah puts forth the examples for the people, perhaps they will remember.

Foul language

[14:26]

And the example of a vile word is like a vile tree which has been uprooted from the surface of the earth, it has nowhere to settle.

Because

[14:27]

Allah makes firm those who believe with firm sayings in the worldly life, and in the Hereafter. And Allah misguides the wicked, and Allah does what He wishes.