Sprinkling

Concise Bible Dictionary:

This mode of applying blood as a witness of death was
1. For protection. When all the firstborn in Egypt were to be smitten, the Israelites were told to “strike,” that is “sprinkle,” the side posts and lintels of their doors with the blood of a lamb, and Jehovah said, “When I see the blood I will pass over you.” Death had already nullified the power of death (Ex. 12:7, 137And they shall take of the blood, and strike it on the two side posts and on the upper door post of the houses, wherein they shall eat it. (Exodus 12:7)
13And the blood shall be to you for a token upon the houses where ye are: and when I see the blood, I will pass over you, and the plague shall not be upon you to destroy you, when I smite the land of Egypt. (Exodus 12:13)
).
3. For presentation. In the burnt offering, the blood was sprinkled round about upon the altar; in the sin offering the blood was sprinkled seven times before the Lord before the vail of the sanctuary; and on the day of atonement the blood was sprinkled upon the mercy-seat eastward, and before the mercy-seat seven times (Lev. 1:55And he shall kill the bullock before the Lord: and the priests, Aaron's sons, shall bring the blood, and sprinkle the blood round about upon the altar that is by the door of the tabernacle of the congregation. (Leviticus 1:5); Lev. 4:66And the priest shall dip his finger in the blood, and sprinkle of the blood seven times before the Lord, before the vail of the sanctuary. (Leviticus 4:6); Lev. 16:1414And he shall take of the blood of the bullock, and sprinkle it with his finger upon the mercy seat eastward; and before the mercy seat shall he sprinkle of the blood with his finger seven times. (Leviticus 16:14)). Death became the means of God accomplishing His purposes of grace. The believer is redeemed, purified, and sanctified by the precious blood of Christ, and is ever before God “perfected” according to the preciousness of that blood (Heb. 9:1414How much more shall the blood of Christ, who through the eternal Spirit offered himself without spot to God, purge your conscience from dead works to serve the living God? (Hebrews 9:14); Heb. 10:10, 1410By the which will we are sanctified through the offering of the body of Jesus Christ once for all. (Hebrews 10:10)
14For by one offering he hath perfected for ever them that are sanctified. (Hebrews 10:14)
; 1 Pet. 1:1919But with the precious blood of Christ, as of a lamb without blemish and without spot: (1 Peter 1:19)).

From Manners and Customs of the Bible:

Some writers think there is an allusion to the custom of sprinkling guests at feasts with perfumed waters from a silver vessel of vase-like shape and with a perforated top, through which the fluid is thrown on the faces of the guests. This sprinkling is sometimes so copious as to cause embarrassment. Bruce, after describing an interview he once had with a certain dignitary, says: “Our coffee being done, I rose to take my leave, and was presently wet to the skin by deluges of orange-flower water.” Niebuhr relates a similar instance: “The first time we were received with all the Eastern ceremonies, (it was at Rosetto, at a Greek merchant’s house,) there was one of our company who was excessively surprised when a domestic placed himself before him and threw water over him, as well on his face as over his clothes.” See Taylor's Calmet; Fragments. No. 16.
Tile engraving represents a perfume-sprinkler of beautiful form, such as is used in some parts of India.