Numbers 28:16-18

Young's Literal Translation

¹⁶ `And in the first month, in the fourteenth day of the month, [is] the passover to Jehovah;

¹⁷ and in the fifteenth day of this month [is] a festival, seven days unleavened food is eaten;

¹⁸ in the first day [is] an holy convocation, ye do no servile work,