Pesachim5: 1
תָּמִיד נִשְׁחָט בִּשְׁמוֹנֶה וּמֶחֱצָה, וְקָרֵב בְּתֵשַׁע וּמֶחֱצָה.  בְּעַרְבֵי פְסָחִים נִשְׁחָט בְּשֶׁבַע וּמֶחֱצָה, וְקָרֵב בִּשְׁמוֹנֶה וּמֶחֱצָה — בֵּין בַּחֹל בֵּין בַּשַּׁבָּת.  חָל עֶרֶב פֶּסַח לִהְיוֹת בְּעֶרֶב שַׁבָּת — נִשְׁחָט בְּשֵׁשׁ וּמֶחֱצָה וְקָרֵב בְּשֶׁבַע וּמֶחֱצָה, וְהַפֶּסַח אַחֲרָיו.
The [afternoon] daily offering is [usually] slaughtered at eight and a half [hours], and offered at nine and a half [hours].  On the eve of Pesach it is slaughtered at seven and a half [hours], and offered at eight and a half [hours], whether it is a weekday or the Sabbath.  [If] the eve of Pesach fell on the eve of the Sabbath, it is slaughtered at six and a half [hours], and offered at seven and a half [hours]. The pesach [-sacrifice is offered] after it.