Leviticus 4:7
And the priest shall put some of the blood upon the horns of the altar of sweet incense before the Lord, which is in the tabernacle of the congregation; and shall pour all the blood of the bullock at the bottom of the altar of the burnt offering, which is at the door of the tabernacle of the congregation.
Cross-references
Leviticus 4:18 repeats the same ritual for the congregation's sin offering — blood on the same altar.
Leviticus 4:34 also puts blood on altar horns but at the bronze altar for a commoner's offering.
Leviticus 4:17 continues the same sin offering: sprinkling blood before the veil, a distinct step from placing blood on the incense altar horns.
Leviticus 4:25 applies blood to the burnt offering altar horns instead of the incense altar, showing a difference for the leader's sin offering.
Leviticus 8:15 describes the same act of daubing blood on the altar's horns during the altar's consecration.
Leviticus 9:9 repeats the blood-on-horns ritual for Aaron's sin offering, identical to Lev 4:7.
Leviticus 16:18 describes the same blood-on-horns act on the incense altar on the Day of Atonement.
In Leviticus 5:9, a different sin offering also involves blood poured at the altar base, but sprinkling on the side instead of on horns.
Exodus 30:1-10 introduces the incense altar whose horns are touched with blood in Lev 4:7.
In Ephesians 2:13, Christ's blood brings believers near to God, fulfilling what the OT blood offerings symbolized — access through atonement.
Hebrews 9:21-25 interprets the OT blood rituals as a pattern for Christ's once-for-all sacrifice in heaven.
Exodus 29:12 shows a similar ritual for priest consecration: blood on altar horns and pouring at the base, mirroring this sin offering.
2 Chronicles 29:22 has priests throwing blood against the altar, not placing it on horns as in Leviticus 4:7 — a variant sin offering practice.