Charles Ellicott Commentary Psalms 49:2

"Both low and high, Rich and poor together." — Psalms 49:2 (ASV)

Both high and low. —The two Hebrew expressions here used, benê-âdam and benê-îsh, answer to one another much as homo and vir in Latin. The Septuagint and Vulgate, taking âdam in its primary sense, render “sons of the soil and sons of men.” Symmachus makes the expressions stand for men in general and men as individuals.

Shall be of understanding. —The copula supplied by the Authorised Version is unnecessary. The word rendered meditation may mean, from its etymology, “muttered thoughts,” and it is quite consistent to say, my musings speak of understanding. So Septuagint and Vulgate.