But at the place which the LORD your God shall choose to place his name in, there you shall sacrifice the passover at evening, at the going down of the sun, at the time that you came forth out of Egypt.

In the morning you shall say, Would God it were evening! and at evening you shall say, Would God it were morning! because of the fear of your heart by which you shall fear, and because of the sight of your eyes which you shall see.

And there shall be no leavened bread seen with you in all your territory seven days; neither shall there any part of the flesh, which you sacrificed the first day at evening, remain all night until the morning.

But it shall be, when evening comes on, he shall wash himself with water: and when the sun is down, he shall come into the camp again.