Numbers 9:3
"In the fourteenth day of this month, at even, ye shall keep it in his appointed season: according to all the rites of it, and according to all the ceremonies thereof, shall ye keep it."
Cross References (ranked by relevance)
For then must he often have suffered since the foundation of the world: but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself.
In the fourteenth day of the first month at even is the LORD’s passover.
For the king had taken counsel, and his princes, and all the congregation in Jerusalem, to keep the passover in the second month.
Then they killed the passover on the fourteenth day of the second month: and the priests and the Levites were ashamed, and sanctified themselves, and brought in the burnt offerings into the house of the LORD.