Nehemiah 10:30-33

30We will not give our daughters in marriage to the people of the land, and we will not take their daughters for our sons.

31When the people of the land bring merchandise or any kind of grain to sell on the Sabbath day, we will not buy from them on a Sabbath or holy day. Every seventh year we will let the fields lie fallow and will cancel every debt.

32We also place ourselves under the obligation to contribute a third of a shekel1 yearly for the service of the house of our God: 33for the showbread, for the regular grain offerings and burnt offerings, for the Sabbath offerings, for the New Moons and appointed feasts, for the holy offerings, for the sin offerings to make atonement for Israel, and for all the duties of the house of our God.