What do we learn from "Shiv'as Yamim Tihyeh Im Imo"?
Rashi: It is a prohibition against the Kohen offering up a Bechor before the eighth day. 1
Targum Yonasan: For seven days it will nurse from its mother.
Hadar Zekenim: Even though I told you to give it to Me promptly, do not rush within seven days, for it came from a filthy place.
What do we learn from "ba'Yom ha'Shemini Titno Li"?
Rashi: What the Pasuk means is that from the eighth day on, the Kohen is permitted to sacrifice it. 1
Seforno: Refer to 22:28:4:2.
Targum Onkelos and Targum Yonasan: Designate it on the eighth day.