Devarim 16:1-2

Orthodox Jewish Bible

16 Be shomer of the month of Aviv [springtime, i.e., Nisan], and perform the Pesach offering unto Hashem Eloheicha; for in the month of Aviv Hashem Eloheicha brought thee forth out of Mitzrayim by lailah.

² Thou shalt therefore sacrifice the Pesach unto Hashem Eloheicha, of the tzon and the herd, in the place which Hashem shall choose to place Shmo there.