Exodus 30:20

From it Moses and Aaron and his sons washed their hands and their feet.

Then Moses had Aaron and his sons come near and washed them with water.

“He shall put on the holy linen tunic, and the linen undergarments shall be next to his body, and he shall be girded with the linen sash and attired with the linen turban (these are holy garments). Then he shall bathe his body in water and put them on.

He also made ten lavers and set five on the right side and five on the left, in which to wash things, that is, in which they would rinse things for the burnt offering; but the sea was for the priests to wash in.

Guard your steps as you go to the house of God and draw near to listen rather than to offer the sacrifice of fools; for they do not know they are doing evil.