that he visited Anas bin Malik at Damascus and found him weeping and asked him why he was weeping. He replied, "I do not know anything which I used to know during the life-time of Allah's Apostle except this prayer which is being lost (not offered as it should be)."
Reference: Sahih al-Bukhari 530 In-book : Book 9, Hadith 9 USC-MSA web (English) : Vol. 1, Book 10, Hadith 507 (deprecated)
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