Ishsheh (אִשֶּׁה) refers specifically to an offering made by fire to the LORD — the collective category of burnt offerings and other sacrifices consumed on the altar. This technical term appears primarily in Leviticus and Numbers in the prescriptions for Israel's sacrificial system, emphasizing that many offerings were presented through fire as the medium of approach to God.
The fire offering embodies the core logic of sacrifice: what is consecrated to God passes through fire — the symbol of His holy presence — and is thereby "given" to Him. Every fire offering pointed forward to Christ, the ultimate offering by fire, who in one act fulfilled the entire sacrificial system (Hebrews 10:12-14). His offering is once for all — no further altar fire is needed.