At-Tufayl ibn Ubayy ibn Ka'b related that he used to visit 'Abdullah ibn 'Umar and would go with him to the market. He said, "When we went to the market, 'Abdullah ibn 'Umar did not pass by any rubbish collector nor merchant nor poor person nor anyone else without greeting them."  

أَخْبَرَهُ أَنَّهُ كَانَ يَأْتِي عَبْدَ اللهِ بْنَ عُمَرَ فَيَغْدُو مَعَهُ إِلَى السُّوقِ قَالَ فَإِذَا غَدَوْنَا إِلَى السُّوقِ لَمْ يَمُرَّ عَبْدُ اللهِ بْنُ عُمَرَ عَلَى سَقَّاطٍ وَلاَ صَاحِبِ بَيْعَةٍ وَلاَ مِسْكِينٍ وَلاَ أَحَدٍ إِلاَّ يُسَلِّمُ عَلَيْهِ