وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ إِسْحَاقَ بْنِ عَبْدِ اللَّهِ بْنِ أَبِي طَلْحَةَ، أَنَّ الطُّفَيْلَ بْنَ أُبَىِّ بْنِ كَعْبٍ، أَخْبَرَهُ أَنَّهُ، كَانَ يَأْتِي عَبْدَ اللَّهِ بْنَ عُمَرَ فَيَغْدُو مَعَهُ إِلَى السُّوقِ قَالَ فَإِذَا غَدَوْنَا إِلَى السُّوقِ لَمْ يَمُرَّ عَبْدُ اللَّهِ بْنُ عُمَرَ عَلَى سَقَاطٍ وَلاَ صَاحِبِ بَيْعَةٍ وَلاَ مِسْكِينٍ وَلاَ أَحَدٍ إِلاَّ سَلَّمَ عَلَيْهِ - قَالَ الطُّفَيْلُ - فَجِئْتُ عَبْدَ اللَّهِ بْنَ عُمَرَ يَوْمًا فَاسْتَتْبَعَنِي إِلَى السُّوقِ فَقُلْتُ لَهُ وَمَا تَصْنَعُ فِي السُّوقِ وَأَنْتَ لاَ تَقِفُ عَلَى الْبَيِّعِ وَلاَ تَسْأَلُ عَنِ السِّلَعِ وَلاَ تَسُومُ بِهَا وَلاَ تَجْلِسُ فِي مَجَالِسِ السُّوقِ قَالَ وَأَقُولُ اجْلِسْ بِنَا هَا هُنَا نَتَحَدَّثْ ‏.‏ قَالَ فَقَالَ لِي عَبْدُ اللَّهِ بْنُ عُمَرَ يَا أَبَا بَطْنٍ - وَكَانَ الطُّفَيْلُ ذَا بَطْنٍ - إِنَّمَا نَغْدُو مِنْ أَجْلِ السَّلاَمِ نُسَلِّمُ

Yahya related to me from Malik from Ishaq ibn Abdullah ibn AbiTalha that at-Tufayl ibn Ubayy ibn Kab told him that he visitedAbdullah ibn Umar one morning and went out with him to the market, andwhen they were out, Abdullah ibn Umar did not pass by anyone sellingpoor merchandise or selling commodities or a needy person or anyonebut that he greeted them. At-Tufayl said, "I came to Abdullahibn Umar one day and he asked me to follow him to the market. I saidto him, 'What will you do in the market if you will not stop to sellnor seek any goods or barter with them or sit in any of the assembliesor market?' Abdullah ibn Umar said that we should sit down and talk,and then he explained, 'Abu Batni, (lit. father of the belly, at-Tufayl had a prominent stomach), we go out in the morning only for thesake of the greeting. We greet whomever we meet.' " Translation Not Available

Book reference: Muwatta Imam Malik Book 53 Hadith 1764
Web reference: Muwatta Imam Malik Book 53 Hadith 6