Genesis 43:34 - Matthew Poole's English Annotations on the Holy Bible

It was the ancient custom of Egypt and other countries in their feasts, that either all the meat, or at least some eminent parts and parcels of it, were not promiscuously set before all the guests, but peculiarly distributed by the master of the feast to the several guests, and that differently, according to his respect and affection to them, or to their several qualities. See 1 Samuel 1:5, 1 Samuel 9:22-24. Five times so much as any of theirs; partly, because of his nearer relation and dearer affection to him; and partly, to observe whether this would raise that envy in them towards him, which was the occasion of their malicious enterprise against himself, that he might accordingly provide for his security. Were merry: the Hebrew word oft signifies to be drunk, but ofttimes it is only to drink liberally, though not to drunkenness, as may appear from Song of Solomon 5:1 Haggai 1:6 1 Thessalonians 2:10.