Narrated Abu Hurairah:
regarding Allah's saying: "It may be that your Lord will raise you to a praised station (17:79)" that the Messenger of Allah (ﷺ) was asked about it and he said: "It is the intercession." (RU)
English reference (RU): Vol. 5, Book 44, Hadith 3137 (RU)
Arabic reference (RU): Book 47, Hadith 3430 (RU)