Bilangan 18:15

18:15 The firstborn of every womb which they present to the Lord, whether human or animal, will be yours. Nevertheless, the firstborn sons you must redeem, ¹  and the firstborn males of unclean animals you must redeem.

Bilangan 31:30

31:30 From the Israelites’ half-share you are to take one portion out of fifty of the people, the cattle, the donkeys, and the sheep – from every kind of animal – and you are to give them to the Levites, who are responsible for the care of the Lord’s tabernacle.”

Bilangan 31:50

31:50 So we have brought as an offering for the Lord what each man found: gold ornaments, armlets, bracelets, signet rings, earrings, and necklaces, to make atonement for ourselves ²  before the Lord.” ³ 

Bilangan 35:33

35:33 “You must not pollute the land where you live, for blood defiles the land, and the land cannot be cleansed of the blood that is shed there, except by the blood of the person who shed it.

[18:15]  ¹ tn The construction uses the infinitive absolute and the imperfect tense of the verb “to redeem” in order to stress the point – they were to be redeemed. N. H. Snaith suggests that the verb means to get by payment what was not originally yours, whereas the other root גָאַל (ga’al) means to get back what was originally yours (Leviticus and Numbers [NCB], 268).

[31:50]  ² tn Heb “our souls.”

[31:50]  ³ sn The expression here may include the idea of finding protection from divine wrath, which is so common to Leviticus, but it may also be a thank offering for the fact that their lives had been spared.