The Mishnah
פסחים ה׳Pesachim 5
Perek 5 of 10 in Pesachim — 10 mishnayot
Mishnah 1א׳
תָּמִיד נִשְׁחָט בִּשְׁמֹנֶה וּמֶחֱצָה וְקָרֵב בְּתֵשַׁע וּמֶחֱצָה. בְּעַרְבֵי פְסָחִים נִשְׁחָט בְּשֶׁבַע וּמֶחֱצָה וְקָרֵב בִּשְׁמֹנֶה וּמֶחֱצָה, בֵּין בְּחֹל בֵּין בְּשַׁבָּת. חָל עֶרֶב פֶּסַח לִהְיוֹת בְּעֶרֶב שַׁבָּת, נִשְׁחָט בְּשֵׁשׁ וּמֶחֱצָה וְקָרֵב בְּשֶׁבַע וּמֶחֱצָה, וְהַפֶּסַח אַחֲרָיו:
The tamid (the perpetual burnt-offering) is slaughtered eight and a half hours (after sunrise) and sacrificed at nine and a half. On Pesach eve it is slaughtered at seven and a half and sacrificed at eight and a half, both on a weekday and on Shabbath. [The afternoon tamid is slaughtered all of the days of the year (excluding Pesach) eight and a half hours (after sunrise). For the time of the slaughtering of the tamid is when the evening shadows begin to fall; that is, from six and a half hours on, when the sun inclines to the west. For between six and seven it stands in the middle of the sky and casts no shadow, but each man's shadow is "beneath" him. And its slaughtering is delayed for two hours after its time because of vows and gift-offerings, it being written (Leviticus 6:5): "And he shall cause to smoke upon it the fats of the peace-offerings, so that nothing come after the afternoon tamid. And even on Shabbath, when vows and gift-offerings are not sacrificed, the time of the slaughtering of the afternoon tamid is delayed for the sake of uniformity with the weekday vows and gift-offerings. And on Pesach eve, when the Pesach offering is sacrificed after the afternoon tamid, it is advanced one hour and slaughtered at seven and a half.] If Pesach eve falls out on Sabbath eve, it is slaughtered at six and a half, [for there is also the roasting of the Pesach, which does not override Shabbath and which must be done while it is still day. The slaughtering of the tamid is, therefore, advanced to six and a half], and it is sacrificed at seven and a half [The end of the sacrifice is at seven and a half, one hour being required for its processing], and the Pesach (is slaughtered) after it.
Mishnah 2ב׳
הַפֶּסַח שֶׁשְּׁחָטוֹ שֶׁלֹּא לִשְׁמוֹ, וְקִבֵּל וְהִלֵּךְ וְזָרַק שֶׁלֹּא לִשְׁמוֹ, אוֹ לִשְׁמוֹ וְשֶׁלֹּא לִשְׁמוֹ, אוֹ שֶׁלֹּא לִשְׁמוֹ וְלִשְׁמוֹ, פָּסוּל. כֵּיצַד לִשְׁמוֹ וְשֶׁלֹּא לִשְׁמוֹ, לְשֵׁם פֶּסַח וּלְשֵׁם שְׁלָמִים. שֶׁלֹּא לִשְׁמוֹ וְלִשְׁמוֹ, לְשֵׁם שְׁלָמִים וּלְשֵׁם פָּסַח:
If one did not slaughter the Pesach lishmo (as such, for its own sake) [as when he slaughtered it as a peace-offering], or if he received [its blood in the sprinkling bowl], or brought [the blood to the altar] or sprinkled [the blood on the altar] not lishmo; or lishmo and not lishmo [as when he slaughtered it lishmo and received the blood not lishmo]; or not lishmo and lishmo, it is invalidated. [We are hereby apprised that thought obtains from one (sacrificial) function to another (i.e., if he thought while performing one function to perform another with an unfit thought, e.g., if he thought: "I shall slaughter it lishmo to sprinkle its blood lo lishmo"), the offering is immediately invalidated, even if he did not perform the second function with that unfit thought. And this is how our Mishnah is to be understood, viz.: "Or [if he thought, while slaughtering, to sprinkle the blood lo lishmo] and [he sprinkled it] lishmo, it is unfit. The fact that lo lishmo renders the Pesach offering unfit is derived from (Exodus 12:27): "And you shall say: 'It is a Paschal sacrifice'" — It must be sacrificed as a Paschal offering. And "it" ("hu") connotes a categorical requirement (which, if not observed, invalidates the offering)]. "Lishmo and not lishmo": How so? Leshem Pesach and leshem shelamim (peace-offering). "Shelo lishmo and lishmo". How so? Leshem shelamim and leshem Pesach. (See above).
Mishnah, Torat Emet 357 edition, via Sefaria — public domain
English: The Mishna with Obadiah Bartenura, tr. Rabbi Shraga Silverstein, via Sefaria — CC BY