And the 39th mitzvah is that we are commanded to bring two sheep, called temidin, daily as offerings in the Temple.

The source of this commandment is G‑d's statement1 (exalted be He), "[Year-old sheep without blemish,] two each day as a regular daily burnt-offering."

The order of their preparation and sacrifice is explained in the 2nd chapter of tractate Yoma2 and in tractate Tamid.