布哈里圣训集 #28
Sahih (Authentic)
A person asked Allah's Messenger (ﷺ), "What (sort of) deeds in or (what qualities of) Islam are good?" He replied, "To feed (the poor) and greet those whom you know and those whom you don't know
传述链（伊斯纳德）
Narrated 'Abdullah bin 'Amr