"For the abundance of the seas will they (Yissachar and Zevulun) suck": Two take in abundance (overflow) and give in abundance — the sea and the authorities.
Variantly: "For the abundance of the seas will they suck": This is the (abundance of) the sea of Yaffo, which is secreted for the righteous for time to come. Whence is it derived that all the ships that foundered in the Great Sea (the Mediterranean) and the stores of silver and gold and precious stones and pearls and all kinds of precious vessels, which are destined for the righteous in time to come — (Whence is it derived) that the Great Sea disgorges them into the Sea of Yaffo? From "For the abundance of the seas will they suck." R. Yossi said: Once I was walking from Cheziv to Tzor, and, finding an old man and greeting him, I asked him: "From what do you earn a living?" He answered: From chilazon (a rare snail). I: "Is it found?" He: "By Heaven, there is a place between the mountains (where it is found), and spiders bite it and it dies and is crushed in its place." I: "By Heaven, that must be the one that is secreted for the righteous for the world to come!"