Matthew Poole and continuators on Genesis 33:19

19 And he bought a parcel of a field where he had spread his tent, at the hand of the children of Hamor, Shechems father, for an hundred pieces of money .

For his present possession and use; for the right which he had to it was onely in Reversion after the time that God had allotted for it.

(i. e.) Subjects, called his Children to note the duty which they owed to him, and the Care and Affection that he owed to them. Compare Numb. 11. 12.

The word is used onely here and Ios. 24. 32. Iob 42. 11. and it may signifie either Lambs, given in way of exchange for it, or pieces of money, which seems more probable, both by comparing Act. 7. 16. and because money was come into use in that place and time, Gen. 17. 12, 13. and 23. 16. and 47. 16. which were called Lambs possibly from the figure of a Lamb stamped upon it, as the Athenian money was called an Oxe for the like reason, and as we call a piece of Gold a Iacobus, because the picture of that King is upon it.

Marginal references: Josh. 24. 32.; called Acts 7. 16. Emor.; Or, lambs.