wholly given: Nethunim, nethunim, "given, given." The word being repeated, "because," says Bp. Patrick, "the children of Israel had devoted them to him, by laying their hands upon them (Num 8:10), and Aaron had waved them as a wave-offering to the Lord" (Num 8:11).
instead of such: Houbigant, on the authority of the Samaritan, reads, "instead of every first-born of the children of Israel, who openeth the womb." Num 3:12, Num 3:45