The Messenger of Allah ﷺ said, "The Jews envy you for nothing more than the greeting of peace and saying 'Ameen.'"
أن رسول الله ﷺ قال: إن اليهود ليحسدونكم على السلام والتأمين.
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Reported by Khatib in his Tarikh (11/43), and Diya Maqdisi in al-Mukhtara (5/107), both through the route of Ibrahim bin Ishaq Harbi, who said, narrated to us Abu Zafar, who said, narrated to us Sulayman bin Mughira, from Thabit, from Anas, and he mentioned it.Maqdisi said about Abu Zafar, "His name is Abdul-Salam bin Mutahhar bin Hassan bin Musakk bin Zalim bin Shaytan Azdi Basri. Bukhari and Abu Dawud Sijistani narrated from him." Its chain is hasan because of Abu Zafar, about whom Abu Hatim said, "He is truthful (saduq)," and Ibn Hibban mentioned him in his book al-Thiqat.Of similar meaning is what has been reported from Ibn Abbas, "The Jews have never envied you for anything as much as they have envied you for saying 'Ameen,' so say 'Ameen' often." This was reported by Ibn Majah (857), but its chain contains Talha bin Amr bin Uthman Hadrami Makki, whom Imam Ahmad and Nasai flatly described as, "Discarded (matruk)."Likewise, what has been reported from Muaz, found in Tabarani's al-Awsat, and from Anas, found in Ibn Khuzayma (1586), and from other companions of the Prophet ﷺ, is not sound.