Leviticus 4:6-7

4:6 The priest must dip his finger in the blood and sprinkle some of it seven times before the Lord toward the front of the veil-canopy of the sanctuary. 4:7 The priest must put some of the blood on the horns of the altar of fragrant incense that is before the Lord in the Meeting Tent, and all the rest of the bull’s blood he must pour out at the base of the altar of burnt offering that is at the entrance of the Meeting Tent.