وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عَطَاءَ بْنَ يَسَارٍ، كَانَ إِذَا مَرَّ عَلَيْهِ بَعْضُ مَنْ يَبِيعُ فِي الْمَسْجِدِ دَعَاهُ فَسَأَلَهُ مَا مَعَكَ وَمَا تُرِيدُ فَإِنْ أَخْبَرَهُ أَنَّهُ يُرِيدُ أَنْ يَبِيعَهُ قَالَ عَلَيْكَ بِسُوقِ الدُّنْيَا وَإِنَّمَا هَذَا سُوقُ الآخِرَةِ ‏.‏

Yahya related to me from Malik that he had heard that if some onepassed by Ata ibn Yasar in the mosque with something to trade, hewould call him and ask, "What is the matter with you? What do youwant?" If the man said that he wished to trade with him, he would say,"You need the market of this world. This is the market of the nextworld." Translation Not Available

Book Ref: Muwatta Imam Malik Book 9 Hadith 427
Web Ref:  Muwatta Imam Malik Book 9 Hadith 95