Exodus 30:11-21

Then the LORD said to Moses, “When you take the census of the Israelites, each one shall give a ransom for himself to the LORD when you count them, so that no plague will come on them when you number them. [Rom 8:1-4] This is what everyone who is counted shall give [as he joins those already counted]: a half shekel, according to the sanctuary shekel (the shekel is twenty gerahs); a half shekel as a contribution to the LORD. Everyone who is counted, from twenty years old and over, [as he joins those already counted], shall give this contribution to the LORD. [Matt 10:24; 1 Pet 1:18, 19] The rich shall not give more and the poor shall not give less than half a shekel, when you give this contribution to the LORD to make atonement for yourselves. You shall take the atonement money from the Israelites and use it [exclusively] for the service of the Tent of Meeting, so that it may be a memorial for the Israelites before the LORD, to make atonement for yourselves.” Then the LORD said to Moses, “You shall also make a basin of bronze, with a base of bronze, for washing. You shall put it [outside in the court] between the Tent of Meeting and the altar [of burnt offering], and you shall put water in it. Aaron and his sons shall wash their hands and their feet. When they enter the Tent of Meeting, they shall wash with water, so that they will not die. Also, when they approach the altar to minister, to burn an offering in the fire to the LORD [they shall do the same]. [John 13:6-8] They shall wash their hands and their feet, so that they will not die; it shall be a perpetual statute for them, for Aaron and his descendants throughout their generations.”