It is reported about Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he was in the orchard of Sayyiduna Abdullah bin al-Zubayr (may Allah be pleased with him), and there he said: the Prophet (peace and blessings be upon him) said: "He is not a believer who eats his fill while his neighbour is hungry."
Al-Tabarani and Abu Ya'la recorded it, and its narrators are thiqat (trustworthy).