Nasr said, I entered Bayt al-Maqdis and found there a man performing many prostrations, and I felt something within myself about that. When he finished, I asked him, "Do you know whether you ended on an even or an odd number?"He replied, "If I do not know, then Allah, the Lord of Majesty, knows." Then he said, "My beloved Abu Qasim ﷺ told me," then he wept. Then he said, "My beloved Abu Qasim ﷺ told me," then he wept. Then he said, "My beloved Abu Qasim ﷺ told me that he said, 'There is no servant who prostrates to Allah a single prostration except that Allah raises him by it one degree, removes from him by it one sin, and records for him by it one good deed.'"I said, "Tell me, who are you, may Allah have mercy on you?"He replied, "I am Abu Dharr, the companion of the Messenger of Allah ﷺ."So I felt small in myself.
دخلت بيت المقدس، فوجدت فيه رجلا يكثر السجود، فوجدت في نفسي من ذلك، فلما انصرف قلت: أتدري على شفع انصرفت أم على وتر؟ قال: إن أك لا أدري، فإن الله ذو الجلال يدري. ثم قال: أخبرني حبي أبو القاسم ﷺ ثم بكى ثم قال: أخبرني حبي أبو القاسم ﷺ ثم بكى ثم قال: أخبرني حبي أبو القاسم ﷺ أنه قال: ما من عبد يسجد لله سجدة إلا رفعه الله بها درجة، وحط عنه بها خطيئة، وكتب له بها حسنة. قال: قلت: أخبرني من أنت يرحمك الله؟ قال: أنا أبو ذر صاحب رسول الله ﷺ. فتقاصرت إلى نفسي.
Imam Ahmad narrated it (21452) from Abdul-Razzaq, and it is also in his Musannaf (3061-4847), where he said, I heard Uzai say, Harun bin Riab told me, from Ahnaf bin Qays, and he related it.Bazzar also narrated it (3903) through Uzai in the same manner. Its chain of transmission is sahih.The hadith has other chains narrated by Imam Ahmad, Tahawi, Bayhaqi, and others, but what I have mentioned is the soundest of them.