Leviticus 14:7, 16, 51

and he shall sprinkle upon him that is to be cleansed from the leprosy seven times, and shall pronounce him clean, and shall let go the living bird into the open field.

and the priest shall dip his right finger in the oil that is in his left hand, and shall sprinkle of the oil with his finger seven times before Jehovah.

and he shall take the cedar-wood, and the hyssop, and the scarlet, and the living bird, and dip them in the blood of the slain bird, and in the running water, and sprinkle the house seven times