BEST ACTIONS H 856 "A man asked the Prophet, praise and peace be upon him, 'What action is best in Islam?' He answered, 'Feeding people and greeting everyone with the greeting of peace whether you know them or not.'" R 856 Bukhari and Muslim with a chain up to Abdullah the son of Amr son of Al 'As who related this.
844- وعن عبد الله بن عمرو بن العاص رضي الله عنهما : أنَّ رجلاً سأل رسول الله صلى الله عليه وآله وسلم : أيُّ الإسْلاَمِ خَيْرٌ ؟ قَالَ : "تُطْعِمُ الطَّعَامَ ، وَتَقْرَأُ السَّلاَمَ عَلَى مَنْ عَرَفْتَ وَمَنْ لَمْ تَعْرِفْ" متفقٌ عَلَيْهِ .