It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: O Allah, for any Muslim about whom harsh words come out from my mouth, make it a means of purification and reward for him.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 15199
Hadith Gradingحکم دارالسلام:حديث صحيح، م: 2602، وهذا إسناد قوي كسابقه