Rambam - 1 Chapter a Day

The water upon which the ashes of the red heifer are placed must be drawn only with a container and only from a spring or flowing river, as Numbers 19:17 states: "And he shall place upon it living water in a vessel."

Placing the ashes of the heifer on the water that was drawn is called sanctification. The water on which the ashes were placed is called mei chatat and sanctified water. Scripture Numbers 19:9 refers to them as mei nidah, "sprinkling water."

Everyone is acceptable to draw the water for the ashes of the red heifer, except a deafmute, an intellectually or emotionally compromised person, and a minor. Similarly, everyone is acceptable to sanctify the water except a deafmute, an intellectually or emotionally compromised person, and a minor.

One must draw such water and sanctify it only with a vessel and one may sprinkle the ashes only from a vessel. Drawing this water and sanctifying it is acceptable at night, but the sprinkling and the immersion of the hyssop in the water is acceptable only during the day. The entire day is fit for the sprinkling and this immersion.

One may draw this water, sprinkle it when mixed with the ashes, and sanctify it with all vessels, even vessels made of animal turds, stone, or earth, or a ship. This applies to earthenware utensils and all other utensils. One may not, however, draw this water, sprinkle the water, or sanctify it with the walls of a vessel, the base of an earthenware distributor of water, the sealing of a jug, one's hands, an egg-shell, or a trough within a natural rock. One may, however, use an egg made by a potter, because it is considered as a vessel made from earth.

We may not sanctify with the base of a wooden vessel, that of a glass vessel, or that of a bone vessel unless they were smoothed down, repaired, and made into vessels in their own right. Similarly, if the sealing of a jug was fixed to serve as a vessel, one may sanctify the water with it. An ostrich egg is acceptable for sanctification. Needless to say, it is acceptable to be used to draw this water and sprinkle from it.

When a utensil was attached to the earth or to rock, even if it was attached with lime, one may sanctify in it or sprinkle from it. The following laws apply if one made a border of clay around such a container and the water in the container was filled beyond its limits until it is held within the border. If the border remains intact when the container is moved, the water in it is acceptable. It is as if it is in a container made from earth. If not, it is as if one formed a border of clay on a rock or on the earth and filled it with water. This would be unacceptable, because the water is not in a container.

When an earthenware container has been perforated to the extent that water would enter it, one may not draw this water or sanctify it with it. If, however, its hole is smaller and water will leak out, but will not enter, one may sanctify with it.

When a container has been perforated from below and plugged close with rags, it is invalid. The rationale is that the water in it is not resting on the base of the utensil, but on the plug. If it was perforated from the side and plugged, it is acceptable to draw this water, sanctify it, and sprinkle it using such a container.

When someone splashes water from a spring with his hands or his feet or with shards, causing them to enter a barrel, the water is unacceptable to be used for a red heifer, because it was not drawn with a utensil. Even if one placed the barrel in the water and pushed the water with his hands or feet or with vegetable leaves so that it flows into the barrel, it is unacceptable. Similarly, if one submerged articles into water so that the water would rise and flow into the barrel, it is unacceptable. If one did the above with the leaves of reeds or nut shells, the water is acceptable.

This is the general principle: If one uses something that is fit to contract ritual impurity to help move the water so that the container will become full, the water is unacceptable. If one used something that is not susceptible to ritual impurity, it is acceptable.

If one causes a spring to flow into a vat or into a pool and then drew water with a container from that pool or vat, it is unacceptable. For at the outset, one must draw water from the spring with a container.

The Great Sea is considered like a mikveh and not like a spring. Therefore water to be sanctified may not be drawn from it. Water from all of the rivers is unacceptable to be sanctified to serve as the water for the ashes of the red heifer. Other seas or lakes are like springs.

Water that flows out from other seas is called running water and is unacceptable. Water flowing from a stream is considered as the stream itself and is acceptable.

Spoiled springs and "lying" waters are unacceptable. The following types of springs are termed spoiled: salty springs or hot springs. "Lying" waters refer to springs that sometimes flow and sometimes, run dry and are arid. Even if they run dry only once in seven years, they are unacceptable. If, however, they run dry only in years of drought or less frequently than once in seven years, or their waters were, at times, abundant and, at times, sparse, but they do not run entirely dry, they are acceptable. When a stream is first discovered, it is deemed acceptable. There is no need to see whether it will run dry in certain years.

Swamps and waters like those of the Jordan and the Yarmuch are unacceptable, because they are mixed waters. This is what is meant by the term "mixed waters": water that is fit to be sanctified that is mixed with water that is unfit. Water should not be drawn from such a mixture. When, by contrast, water that is acceptable becomes mixed with other water that is acceptable, e.g., the water of two streams become mixed and flow together, water for the ashes of a red heifer may be drawn from them.

If the appearance or flavor of water changes because of itself, it is acceptable.

If a shard or earth fell into a well and caused its water to become murky, one may still draw water for the ashes of a red heifer from it. It is not necessary to wait until the water clears. If a flow of rainwater falls into it, one should wait until the water becomes clear.

It is acceptable to draw water for the ashes of the red heifer from an irrigation canal that brings water from a distance, since it originates in a wellspring, provided one is careful that a person does not interrupt the flow. Were that to happen, one would be drawing water that originated in a wellspring, but was interrupted; this is not acceptable.