Purity of speech and discourse

لَا يَسْمَعُونَ فِيهَا لَغْوًا وَلَا تَأْثِيمًا

They will not hear therein ill speech or commission of sin -

لَّا يَسْمَعُونَ فِيهَا لَغْوًا وَلَا كِذَّٰبًا

No ill speech will they hear therein or any falsehood -