The Prophet ﷺ said, "If you only knew" — or "if they only knew" — "what reward lies in the first row, you would have to draw lots for it."
عن النبي ﷺ قال: لو تعلمون (أو يعلمون) ما في الصف المقدم، لكانت قرعة.
Muslim narrated it in the Book of Prayer (439) from the hadith of Shuba, from Qatada, from Khilas, from Abu Rafi, from Abu Hurairah, and he mentioned the hadith.