Good & Bad Words

The Qur’an states:

كَلِمَةً طَيِّبَةً كَشَجَرَ‌ةٍ طَيِّبَةٍ أَصْلُهَا ثَابِتٌ وَفَرْ‌عُهَا فِي السَّمَاءِ * تُؤْتِي أُكُلَهَا كُلَّ حِينٍ بِإِذْنِ رَ‌بِّهَا ۗ وَيَضْرِ‌بُ اللَّـهُ الْأَمْثَالَ لِلنَّاسِ لَعَلَّهُمْ يَتَذَكَّرُ‌ونَ * وَمَثَلُ كَلِمَةٍ خَبِيثَةٍ كَشَجَرَ‌ةٍ خَبِيثَةٍ اجْتُثَّتْ مِن فَوْقِ الْأَرْ‌ضِ مَا لَهَا مِن قَرَ‌ارٍ
“A good word is like a GOOD TREE, whose root is firmly fixed and its branches reach the sky.
It produces its fruit all the time, by permission of its Lord.
And God presents examples for the people that perhaps they will be reminded.
And the example of a bad word is like a BAD TREE, uprooted from the surface of the earth, not having any stability.”

[Qur’an 14:24-26].