Numbers 28:18

18 On the first day there shall be a holy convocation. You shall not work at your occupations.

Numbers 28:18 In-Context

16 On the fourteenth day of the first month there shall be a passover offering to the Lord.
17 And on the fifteenth day of this month is a festival; seven days shall unleavened bread be eaten.
18 On the first day there shall be a holy convocation. You shall not work at your occupations.
19 You shall offer an offering by fire, a burnt offering to the Lord: two young bulls, one ram, and seven male lambs a year old; see that they are without blemish.
20 Their grain offering shall be of choice flour mixed with oil: three-tenths of an ephah shall you offer for a bull, and two-tenths for a ram;
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.