It is narrated from Sayyiduna al-Miqdam bin Ma'di Karib (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "No one has filled a vessel worse than a stomach. If his appetite overcomes him, let him leave one third for his breath."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17796