It means speaking “with graciousness, ” using the tongue to heal rather than to hurt. ​ — Read Proverbs 12: 18; 18: 21.
تَقُولُ :‏ « كَثْرَةُ ٱلْكَلَامِ لَا تَخْلُو مِنْ مَعْصِيَةٍ ،‏ أَمَّا ٱلضَّابِطُ شَفَتَيْهِ فَهُوَ فَطِينٌ » .‏ ‏