Sayyiduna Ibn Abbas (may Allah be pleased with them both), while applying (these words) to Ibn al-Zubayr (may Allah be pleased with them both), said: The Messenger of Allah (peace and blessings be upon him) said: "The believer is not the one who eats his fill while his neighbour is hungry."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12687