Nehemiah 10:30-33

30We would not give our daughters as wives to the peoples of the land, nor take their daughters for our sons;

31if the peoples of the land brought wares or any grain to sell on the Sabbath day, we would not buy it from them on the Sabbath, or on a holy day; and we would forego the seventh year’s produce and the exacting of every debt.

32Also we made ordinances for ourselves, to exact from ourselves yearly one-third of a shekel for the service of the house of our God:

33for the showbread, for the regular grain offering, for the regular burnt offering of the Sabbaths, the New Moons, and the set feasts; for the holy things, for the sin offerings to make atonement for Israel, and all the work of the house of our God.