How sound and what is the interpretation of the Hadith: "He who spends the night replete while his neighbor is hungry shall not enter Paradise"?

The Hadith is authentic, and its meaning, as the scholars have stated, is: "The perfect believer is not he who eats his fill while his neighbor is hungry beside him and he knows it." This is because he has failed to uphold the rights of neighborliness, and it indicates the hardness of his heart, his stinginess, and the degradation of his chivalry.