John Wesley on Leviticus 1:5

And he - Either, the offerer, who is said to do it, namely, by the priest; for men are commonly said to do what they cause others to do, as John 4:1,2. the priest, as it follows, or the Levite, whose office this was. Shall sprinkle the blood - Which was done in a considerable quantity, and whereby was signified, That the offerer deserved to have his blood spilt in that manner. That the blood of Christ should be poured forth for sinners, and that this was the only mean of their reconciliation to God, and acceptance with him.