Talmud su Salmi 49:1

It is written, hear this all nations, listen all who dwell like moles³⁴Ps. 49:1. Usually the word חֶלֶד “world” is derived from خلد “to be permanent”, not חלד “to burrow”.. Rebbi Aha said, Rebbi Abbahu and the rabbis. One said, why does he compare all creatures to a mole? Only because everything that exists on dry land exists in the sea, but there are many species in the sea which are not on land, and there is no mole in the sea. But the other said, why does he compare all creatures to a mole? Like this mole which drags and deposits and does not know for whom it deposits, so are the creatures, they always drag and collect and do not know for whom they collect; he piles up and does not know for whom he assembled it³⁵Ps. 39:7..