Samuel
Ruth 4:2BSB·traditional attribution

Then Boaz took ten of the elders of the city and said, “Sit here,” and they did so.

Matthew Henry Presbyterian @wholebiblehenry

Here, 1. Boaz calls a court immediately. It is probable he was himself one of the elders (or aldermen) of the city; for he was a mighty man of wealth. Perhaps he was father of the city, and sat chief; for he seems here to have gone up to the gate as one having authority, and not as a common person; like Job, Job 29:7, etc.

Commenting on Ruth 4:1-8

John Gill Reformed Baptist @doctorgill

And he took ten men of the elders of the city,.... Who were such, not merely in age but in office, who were the heads of thousands, fifties, and tens; ten of whom were a quorum to do business in judiciary affairs, to determine such matters as Boaz had propose, as to whom the right of redemption of a brother and kinsman's widow, and her...

Jamieson-Fausset-Brown Reformed @jfbcommentary

he took ten men of the elders of the city--as witnesses. In ordinary circumstances, two or three were sufficient to attest a bargain; but in cases of importance, such as matrimony, divorce, conveyancing of property, it was the Jewish practice to have ten (Kg1 21:8).