Wikipedia
Kesitah
Kesitah translated from the Hebrew means, “part, measure, piece of money.” The word appears in Genesis 33:19 and Joshua 24:32 where Jacob paid 100 kesitahs for land near Shechem. The earliest Greek translation translated kesitah as “lamb.” After God restored his fortunes, Job received a kesitah from each of his friends ( Job 42:11). Subsequently, the kesitah was probably a piece of money of a particular weight, cast in the form of a lamb (or unminted of a certain weight, the price of a lamb). Monuments in Egypt show that such weights were used as a form of currency