הלכה על עדיות 6:1

From the laws of the commandment - that which they, may their memory be blessed, said (Yoma 28a) that the time of their slaughter is, of the one lamb of the morning before the rising of the sun, from when the entire face of the East is light, and once in the Second Temple, the time pushed the community and they sacrificed the regular sacrifice of the morning at four hours in the day (Mishnah Eduyot 6:1); and the time of the second lamb of the afternoon is from six and a half hours and onward until the end of the day (Pesachim 58a), but [in fact,] they would always sacrifice it at eight and a half hours and offer it at nine and a half [hours], and these two hours that they would delay it were in order that that they could sacrifice individual and community sacrifices in between, as it is forbidden to sacrifice another sacrifice after the afternoon sacrifice; [that] the process of the regular afternoon sacrifice was like the process of the regular morning sacrifice, except that the one of the morning was sacrificed in the northeastern corner of the room of the slaughterers on the second ring, and [the one] of the afternoon was in the northwestern corner on the second ring, so that it be in front of the sun; and the rest of its details - are elucidated in Tractate Tamid and in the second chapter of Yoma (see Mishneh Torah, Laws of Daily Offerings and Additional Offerings 1).