In Nehemiah 10:12, the Israelites make a solemn commitment to give a tithe of all their produce to support the work of the house of God. This act of tithing was a way for the people to demonstrate their obedience to God's commands and their willingness to support the priests and Levites who served in the temple. By faithfully giving a portion of their resources, the Israelites acknowledged God's ownership over all they had and expressed their gratitude for His provision. This verse highlights the importance of generosity, stewardship, and honoring God with the firstfruits of their labor.