'Running' in the Bible
Next the priest shall order that one of the birds be killed [as a sacrifice] in an earthenware container over [fresh] running water.
As for the live bird, he shall take it together with the cedar wood and the scarlet string and the hyssop, and shall dip them and the live bird in the blood of the bird sacrificed over the running water.
and he shall take the cedar wood and the hyssop and the scarlet string, and the living bird, and dip them in the blood of the slain bird as well as in the running water, and sprinkle the house seven times.
So he shall cleanse the house with the blood of the bird and with the running water, along with the live bird and the cedar wood and the hyssop and the scarlet string.
“Speak to the children of Israel, and say to them, ‘When any man has a bodily discharge, his discharge is unclean.
This shall be [the law concerning] his uncleanness in his discharge: whether his body allows its discharge to flow or obstructs its flow; it is uncleanness in him.
‘When the man with the discharge becomes cleansed from his discharge, he shall count off seven days for his purification; he shall then wash his clothes and bathe his body in running water and will become clean.