Numbers 9:3-5 ▼

3 On the fourteenth day of this month, at twilight, you shall observe it at its appointed time; you shall observe it according to all its statutes and according to all its judgments.”

4 So Moses told the sons of Israel to celebrate the Passover.

5 And they celebrated the Passover in the first month, on the fourteenth day of the month, at twilight, in the wilderness of Sinai; according to all that Yahweh had commanded Moses, so the sons of Israel did.