Boyd’s Bible Dictionary:

(pledges). The earliest O. T. mention of wages shows that they were paid in kind and not in money (Gen. 29:15,20; 30:28; 31:7-8,4115And Laban said unto Jacob, Because thou art my brother, shouldest thou therefore serve me for nought? tell me, what shall thy wages be? (Genesis 29:15)
20And Jacob served seven years for Rachel; and they seemed unto him but a few days, for the love he had to her. (Genesis 29:20)
28And he said, Appoint me thy wages, and I will give it. (Genesis 30:28)
7And your father hath deceived me, and changed my wages ten times; but God suffered him not to hurt me. 8If he said thus, The speckled shall be thy wages; then all the cattle bare speckled: and if he said thus, The ringstraked shall be thy hire; then bare all the cattle ringstraked. (Genesis 31:7‑8)
41Thus have I been twenty years in thy house; I served thee fourteen years for thy two daughters, and six years for thy cattle: and thou hast changed my wages ten times. (Genesis 31:41)
). Wages paid in money are mentioned in N. T. (Matt. 20:22And when he had agreed with the laborers for a penny a day, he sent them into his vineyard. (Matthew 20:2)). The Mosaic law was very strict in requiring daily payment of wages (Lev. 19:1313Thou shalt not defraud thy neighbor, neither rob him: the wages of him that is hired shall not abide with thee all night until the morning. (Leviticus 19:13); Deut. 24:14-1514Thou shalt not oppress an hired servant that is poor and needy, whether he be of thy brethren, or of thy strangers that are in thy land within thy gates: 15At his day thou shalt give him his hire, neither shall the sun go down upon it; for he is poor, and setteth his heart upon it: lest he cry against thee unto the Lord, and it be sin unto thee. (Deuteronomy 24:14‑15)).