It is narrated from Hazrat Anas (may Allah be pleased with him) that some Jews once came to the service of the Prophet (peace and blessings be upon him) and, while greeting, said "As-Saam Alaikum" (death be upon you). The Prophet (peace and blessings be upon him) also replied, "As-Saam Alaikum." Hazrat Aisha (may Allah be pleased with her), hearing this phrase of the Jews from behind, said, "O brothers of apes and swine! Death (sam), and the curse and wrath of Allah be upon you." The Prophet (peace and blessings be upon him) advised Hazrat Aisha (may Allah be pleased with her) to remain calm. She submitted, "O Messenger of Allah (peace and blessings be upon him)! Did you not hear what they said?" The Prophet (peace and blessings be upon him) said, "Aisha! Did you not hear what I replied to them? Gentleness, whenever it is present in something, adorns it, and whenever it is taken away from something, it makes it defective."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 13531
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف الضعف مؤمل بن إسماعيل، والحديث بنحوه فى الصحيح: 6927 من رواية عائشة، وسيأتي فى المسند برقم: 24090