The Passover to the LORD begins at twilight on the fourteenth day of the first month.

Exodus 12:6
You must keep it until the fourteenth day of the month, when the whole assembly of the congregation of Israel will slaughter the animals at twilight.

Exodus 12:14
And this day will be a memorial for you, and you are to celebrate it as a feast to the LORD, as a permanent statute for the generations to come.

Exodus 12:18
In the first month you are to eat unleavened bread, from the evening of the fourteenth day until the evening of the twenty-first day.

Exodus 12:19
For seven days there must be no leaven found in your houses. If anyone eats something leavened, that person, whether a foreigner or native of the land, must be cut off from the congregation of Israel.

Numbers 9:2
"The Israelites are to observe the Passover at its appointed time.

Numbers 28:16
The fourteenth day of the first month is the LORD's Passover.

Deuteronomy 16:1
Observe the month of Abib and celebrate the Passover to the LORD your God, because in the month of Abib the LORD your God brought you out of Egypt by night.

Joshua 5:10
On the evening of the fourteenth day of the month, while the Israelites were camped at Gilgal on the plains of Jericho, they kept the Passover.

Ezekiel 45:21
On the fourteenth day of the first month you are to observe the Passover, a feast of seven days, during which unleavened bread shall be eaten.

In the fourteenth day of the first month at even is the LORD's passover.