Hadith.3053 - Imam Jafar ibn Muhammad Al-Sadiq (as) was asked about the words of Allah (swt), the Exalted: "Then when they are down on their sides (after being sacrificed), eat from them and feed the contented one and the beggar." (Surah Al-Hajj 22:36)
Imam (as) replied: "The 'contented one' is the one who accepts whatever you give him, and the 'beggar' is the one who approaches you asking."