Numbers 33:15

You shall keep it until the fourteenth day of the same month; and the whole assembly of the congregation of Israel shall kill it at evening.

In the third month after the children of Israel had gone out of the land of Egypt, on that same day they came into the wilderness of Sinai.

They traveled from the Red Sea, and encamped in the wilderness of Sin.

They will listen to your voice. You shall come, you and the elders of Israel, to the king of Egypt, and you shall tell him, ‘Yahweh, the God of the Hebrews, has met with us. Now please let us go three days’ journey into the wilderness, that we may sacrifice to Yahweh, our God.’

“This month shall be to you the beginning of months. It shall be the first month of the year to you.

They came to Elim, where there were twelve springs of water, and seventy palm trees. They encamped there by the waters.

They took their journey from Elim, and all the congregation of the children of Israel came to the wilderness of Sin, which is between Elim and Sinai, on the fifteenth day of the second month after their departing out of the land of Egypt.

All the congregation of the children of Israel traveled from the wilderness of Sin, starting according to Yahweh’s commandment, and encamped in Rephidim; but there was no water for the people to drink.

Yahweh said to Moses in Mount Sinai,

They traveled from Elim, and encamped by the Red Sea.

Yahweh spoke to Moses in the wilderness of Sinai, in the Tent of Meeting, on the first day of the second month, in the second year after they had come out of the land of Egypt, saying,