Sifrei Devarim 129

¹(Devarim 16:2) "And you shall slaughter a Pesach": Its slaughtering must be in the name of Pesach; otherwise, it is unfit. ²This tells me only of its slaughtering. Whence do I derive the same for the receiving of its blood and the sprinkling of the blood? From (1) "and you shall make the Pesach." ³I might think to include ("in the name of Pesach") the burning of its fats; it is, therefore, written "and you shall slaughter." ⁴Slaughtering was in the general category (of "making"). Why was it singled out (for special mention)? To serve as a basis for comparison, viz.: Just as slaughtering is distinct in being categorically required for atonement, so, all that is so required (is included) — to exclude the burning of the fats, which is not thus required. ⁵"to the L-rd your G-d": for His name's sake. ⁶"sheep and cattle": Does the Paschal offering not come from lambs and kids? If so, why "sheep and cattle"? Sheep for the Pesach offering and cattle for the festive offering ( chagigah ), and to compare all that comes from sheep and cattle to the Pesach, viz.: Just as Pesach is a mandatory offering and comes only from chullin (non-consecrated) animals, so all mandatory offerings must come from chullin . ⁷" in the place that the L-rd your G-d shall choose to repose His name there": Shiloh and the Temple.