Nehemiah 10:28-32

Now the rest of the people, the priests, the Levites, the gatekeepers, the singers, the temple servants, and all those who had separated themselves from the peoples of the lands to the Law of God, their wives, their sons, and their daughters, all those who had knowledge and understanding,

are joining with their kinsmen, their nobles, and are taking on themselves a curse and an oath to walk in God’s Law, which was given through Moses, God’s servant, and to keep and to comply with all the commandments of God our Lord, and His ordinances and statutes;

and that we will not give our daughters to the peoples of the land or take their daughters for our sons.

As for the peoples of the land who bring wares or any grain on the Sabbath day to sell, we will not buy from them on the Sabbath or on any holy day; and we will forgo the crops of the seventh year and every debt.

We also imposed on ourselves the obligation to contribute yearly a third of a shekel for the service of the house of our God: