hadith
9111
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Imam Ali (AS) said, Nothing is more beneficial for a human being than guarding the tongue and doing good to others.
الإمامُ عليٌّ (عَلَيهِ الّسَلامُ) : لاشَيْءَ أعْوَدُ عَلَى الإنْسانِ مِنْ حِفْظِ اللِّسانِ وَبَذْلِ الإحْسانِ