Alyah (אַלְיָה) refers specifically to the fat tail of the sheep (particularly the broad-tailed sheep common in the ancient Near East). This fatty appendage could weigh several pounds and was considered a prized delicacy. In the sacrificial law, the alyah was one of the specific fat portions that was required to be burned on the altar as "a food offering, an aroma pleasing to the LORD" (Exodus 29:22; Leviticus 3:9).
The careful specification of the fat tail in sacrificial law reveals the precision of God's holiness. The altar received the choicest portions — fat, which represented the richness and vitality of life — not the leftovers. Malachi 1:8 condemns those who offered blind, lame, and diseased animals: "Is that not wrong?" God deserves the best, not the remnants. The sacrificial system as a whole was a shadow of Christ's perfect self-offering (Hebrews 10:1–14). Where Israel offered fat tails on altars of stone, the Son of God offered His entire self on the cross. True worship costs something. The word alyah reminds us that relationship with God has never been casual — it begins with surrender of what is most valuable.