Jabir binAbdullah (RA) reported that some people from amongst the Jews said to Allahs Messenger ﷺ Abul-Qasim as-Sam-u-Alaikum, whereupon he said: Wa Alaikum. Aisha was enraged and asked him (Allahs Apostle) ﷺ whether he had not heard what they had said. He said, I did hear and I retorted to them (and the curse that I invoked upon them would receive response from Allah), but (the curse that they invoked upon us) would not be responded.