Numbers 9:3

9:3 In the fourteenth day of this month, at twilight, ¹  you are to observe it at its appointed time; you must keep ²  it in accordance with all its statutes and all its customs.” ³ 

Numbers 9:12

9:12 They must not leave any of it until morning, nor break any of its bones; they must observe it in accordance with every statute of the Passover.

Numbers 19:10

19:10 The one who gathers the ashes of the heifer must wash his clothes and be ceremonially unclean until evening. This will be a permanent ordinance both for the Israelites and the resident foreigner who lives among them.

Numbers 19:21

19:21 “‘So this will be a perpetual ordinance for them: The one who sprinkles ⁴  the water of purification must wash his clothes, and the one who touches the water of purification will be unclean until evening. ⁵ 

Numbers 31:21

31:21 Then Eleazar the priest said to the men of war who had gone into the battle, “This is the ordinance of the law that the Lord commanded Moses:

[9:3]  ¹ tn The literal Hebrew expression is “between the evenings” (so also in vv. 5, 11). Sunset is certainly one evening; the other may refer to the change in the middle of the afternoon to the late afternoon, or the beginning of dusk. The idea is probably just at twilight, or dusk (see R. B. Allen, TWOT 2:694).

[9:3]  ² tn The two verbs in this verse are identical; they are imperfects of instruction. The English translation has been modified for stylistic variation.

[9:3]  ³ tn The two words in this last section are standard “Torah” words. The word חֹק (khoq) is a binding statute, something engraved and monumental. The word מִשְׁפָּט (mishpat) means “judgment, decision,” but with a more general idea of “custom” at its core. The verse is making it very clear that the Passover had to follow the custom and form that was legislated in Egypt.

[19:21]  ⁴ tn The form has the conjunction with it: וּמַזֵּה (umazzeh). The conjunction subordinates the following as the special law. It could literally be translated “and this shall be…that the one who sprinkles.”

[19:21]  ⁵ sn This gives the indication of the weight of the matter, for “until the evening” is the shortest period of ritual uncleanness in the Law. The problem of contamination had to be taken seriously, but this was a relatively simple matter to deal with – if one were willing to obey the Law.