Deuteronomy 16:4-6

Young's Literal Translation

⁴ and there is not seen with thee leaven in all thy border seven days, and there doth not remain of the flesh which thou dost sacrifice at evening on the first day till morning.

⁵ `Thou art not able to sacrifice the passover within any of thy gates which Jehovah thy God is giving to thee,

⁶ except at the place which Jehovah thy God doth choose to cause His name to tabernacle -- there thou dost sacrifice the passover in the evening, at the going in of the sun, the season of thy coming out of Egypt;