Numbers 8:17

17 for Mine [is] every first-born among the sons of Israel, among man and among beast; in the day of my smiting every first-born in the land of Egypt I sanctified them for Myself;

Numbers 8:17 Meaning and Commentary

Numbers 8:17

For all the firstborn of the children of Israel [are] mine,
[both] men and beasts
Not only in common with other of his creatures, but in a special respect on account of his signal deliverance of them; they were his, as Jarchi expresses it, by the line of judgment, or rule of justice and equity, because he protected them among the firstborn of the Egyptians, saved them when he slew theirs, as follows:

in the day that I smote every firstborn in the land of Egypt;
both of men and beasts:

I sanctified them for myself;
claimed them as his own, and set them apart for his own use, or ordered them to be set apart: see ( Exodus 13:2 ) .

Numbers 8:17 In-Context

15 and afterwards do the Levites come in to serve the tent of meeting, and thou hast cleansed them, and hast waved them -- a wave-offering.
16 `For they are certainly given to Me out of the midst of the sons of Israel, instead of him who openeth any womb -- the first-born of all -- from the sons of Israel I have taken them to Myself;
17 for Mine [is] every first-born among the sons of Israel, among man and among beast; in the day of my smiting every first-born in the land of Egypt I sanctified them for Myself;
18 and I take the Levites instead of every first-born among the sons of Israel:
19 `And I give the Levites gifts to Aaron and to his sons, from the midst of the sons of Israel, to do the service of the sons of Israel in the tent of meeting, and to make atonement for the sons of Israel, and there is no plague among the sons of Israel in the sons of Israel's drawing nigh unto the sanctuary.'
Young's Literal Translation is in the public domain.