1 Esdras 1:11-16
11 And according to the several dignities of the fathers, before the people, to offer to the Lord, as it is written in the book of Moses: and thus did they in the morning.
12 And they roasted the passover with fire, as appertaineth: as for the sacrifices, they sod them in brass pots and pans with a good savour,
13 And set them before all the people: and afterward they prepared for themselves, and for the priests their brethren, the sons of Aaron.
14 For the priests offered the fat until night: and the Levites prepared for themselves, and the priests their brethren, the sons of Aaron.
15 The holy singers also, the sons of Asaph, were in their order, according to the appointment of David, to wit, Asaph, Zacharias, and Jeduthun, who was of the king's retinue.
16 Moreover the porters were at every gate; it was not lawful for any to go from his ordinary service: for their brethren the Levites prepared for them.