Sunan Abi Dawud Dialects and Readings of the Qur'an (Kitab Al-Huruf Wa Al-Qira'at) al-Rabi' bin Anas al-Bakry الربيع بن أنس البكري Ishaq bin Sulaiman al-Razi إسحاق بن سليمان الرازي Muhammad bin Rafa'i محمد بن رافع Sahih The Prophet (ﷺ) as saying – the narrator Isma’il transmitted it from Abu Hurairah, and mentioned the tradition about the coming down of revelation-: “So far (is this the case) that when terror is removed from their hearts.” https://parallelquran.com/hadith/sunan-abi-dawud-3989/