Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: That I perform ablution after speaking an evil word is dearer to me than that I perform ablution after eating good food.
Imam al-Tabarani recorded this report in al-Mu'jam al-Kabir, and its narrators have been declared trustworthy.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الطهارة / 1345