Scarcely of the nature of sacrifice, yet intensifying the idea of ceremonial uncleanness was the burning of the “red heifer”――the gathering up of her ashes and the preparation from them of “the water of separation”――a purification from sin in the ceremonial sense. Num. 19 gives the details, specifying the sorts of uncleanness which this purifying water washed away. The writer to the Hebrews (9: 13, 14) gave the great moral inference thus: “For if the blood of bulls and of goats and the ashes of an heifer sprinkling the unclean sanctifieth to the purifying of the flesh, how much more shall the blood of Christ who through the eternal Spirit offered himself unto God, purge your conscience from dead works to serve the living God”? II. STATED TIMES AND SEASONS OF WORSHIP. 1. _The Morning and Evening Sacrifice._ Two lambs of one year were offered every day; the one in the morning and the other at evening [Heb. “between the evenings”]; burnt offerings, consumed wholly upon the altar. They were accompanied with a small portion of flour, oil, and wine. This was a perpetual ordinance, never to be omitted. The original institution (Ex. 29: 38–46) is accompanied with God’s very gracious promise to meet with his people and dwell among them, sanctifying the place of this meeting by his glory. Nothing could suggest more pertinently and tenderly that God loves to see the face of his worshiping people and to meet them as each day opens in the morning and as it closes with the setting sun. Let this communion between God and his sons and daughters never be in any wise interrupted.――――The usage seems to have led pious Jews in later times to adopt these hours for their morning and evening prayer, as we may see in the case of Daniel (9: 21), and in the New Testament history.――――The ritual for these sacrifices is given in detail (Num. 28: 3–8). 2. _The Sacrifices for the Sabbath._ Each Sabbath had an extra service in addition to the continual morning and evening sacrifice――two lambs of the first year without spot; with the attendant meat and drink-offerings (Num. 29: 9, 10). * * * * * 3. _The sacrifices at each new moon_ were on a larger scale than either of the preceding, viz. two young bullocks, one ram, and seven lambs for the burnt-offering; one kid of goats for the sin-offering. As the Hebrew months were lunar (not solar), these sacrifices upon the appearance of the new moon inaugurated the successive months. It was probably for this reason that they were announced with blowing of trumpets (Num. 10: 10). The calendar was thus regulated――a matter of special importance, since it fixed the time of their three great religious festivals as also the great day of atonement. 4. _The Three Great Religious Festivals._ Of these the first in order (the Passover) has been considered already.