Ezekiel 43:18
And he said unto me, Son of man, thus saith the Lord God; These are the ordinances of the altar in the day when they shall make it, to offer burnt offerings thereon, and to sprinkle blood thereon.
Cross-reference
Ezekiel 45:19 details blood application on the altar's ledge — directly connecting to the sprinkling commanded here.
Ezekiel 45:18 commands a specific annual purification of the sanctuary, expanding on the general altar ordinances here.
Leviticus 1:5-17 prescribes the burnt offering ritual with blood sprinkling — the very rite this altar is designed for.
Leviticus 16:19 describes the altar's purification on the Day of Atonement — a specific instance of the sprinkling here.
Hebrews 9:21-23 interprets OT blood purification as foreshadowing Christ's sacrifice — the theological fulfillment of these altar rites.
Hebrews 10:4-12 argues animal sacrifices cannot remove sin, directly contrasting the OT altar ordinances here requiring blood offerings.