At the dedication of the wall of Jerusalem, ¹  they sought out the Levites from all the places they lived ²  to bring them to Jerusalem to celebrate the dedication joyfully with songs of thanksgiving and songs accompanied by cymbals, harps, and lyres.

We will not buy ¹  on the Sabbath or on a holy day from the neighboring peoples who bring their wares and all kinds of grain to sell on the Sabbath day. We will let the fields lie fallow every seventh year, and we will cancel every loan. ² 

So in the days of Zerubbabel and in the days of Nehemiah, all Israel was contributing the portions for the singers and gatekeepers, according to the daily need. ¹  They also set aside ²  the portion for the Levites, and the Levites set aside the portion for the descendants of Aaron.