לרצנכם תזבחו. תְּחִלַּת זְבִיחַתְכֶם הִזָּהֲרוּ שֶׁתְּהֵא לְרָצוֹן לָכֶם, וּמַהוּ הָרָצוֹן? לרצנכם תזבחו [AND WHEN YE WILL SLAUGHTER A SACRIFICE OF ACKNOWLEDGEMENT UNTO THE LORD], SLAUGHTER IT SO THAT IT MAY EFFECT PROPITIATION FOR YOU — i. e. take care from the very outset of your slaughtering that it should effect acceptance for you; and wherein consists the assurance of its acceptance?
ביום ההוא יאכל. לֹא בָא לְהַזְהִיר אֶלָּא שֶׁתְּהֵא שְׁחִיטָה עַל מְנָת כֵּן — אַל תִּשְׁחֲטוּהוּ עַל מְנָת לְאָכְלוֹ לְמָחָר, שֶׁאִם תַּחְשְׁבוּ בוֹ מַחֲשֶׁבֶת פְּסוּל לֹא יְהֵא לָכֶם לְרָצוֹן; דָּ"אַ לרצנכם — לְדַעְתְּכֶם, מִכָּאן לַמִּתְעַסֵּק שֶׁפָּסוּל בִּשְׁחִיטַת קָדָשִׁים; וְאַעַ"פִּ שֶּׁפֵּרֵט בַּנֶּאֱכָלִים לִשְׁנֵי יָמִים, חָזַר וּפֵרֵט בַּנֶּאֱכָלִין לְיוֹם אֶחָד שֶׁתְּהֵא זְבִיחָתָן עַל מְנָת לְאָכְלָן בִּזְמַנָּן: ביום ההוא יאכל in the intention that IT SHALL BE EATEN ON THE SAME DAY — Scripture intends by these words only to express the warning that the slaughtering shall be made with this intention: — do not slaughter it with the intention of eating it on the morrow, because if you then harbour any intention which will lead to its disqualification it shall not be favourably accepted for you. Another explanation of לרצנכם is: sacrifice it wittingly (with full knowledge of what you are doing); hence we may derive that if one is “handling” the sacrifices when slaughtering them (i. e. when he does the act of שחיטה without the intention of doing this) they become invalid (Chullin 13a). And (referring again to the first explanation) though Scripture has already specifically stated this (the fact that the slaughtering must be made with the clear intention not to eat the flesh beyond the prescribed time) with regard to such offerings that may be eaten during two successive days (cf. Leviticus 7:18), it specifically states here again of those sacrifices which are permitted to be eaten on one day only that their slaughtering must take place with the clear intention to eat them within the time prescribed for them.