It is narrated from Sayyiduna al-Irbad bin Sariyah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever licks the plate and licks his fingers, Allah will satisfy him in this world and the Hereafter."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15744