iškaru

Definition

Iškaru (Akkadian, originally "work-assignment") is the cuneiform scribal term for an official, authoritatively-transmitted canonical series — a fully edited reference corpus with a fixed sequence of tablets. In celestial divination, "the Series" (iškaru) denotes Enūma Anu Enlil, the standardized roughly-70-tablet omen compendium. Iškaru is the formal counterpart of aḫû ("extraneous") and ša pî ummâni ("from the scholar's mouth"), the two streams of omen material lying outside the canonical Series.

In Tradition

Assyriological scholarship treats the iškaru / aḫû distinction as the native Mesopotamian indicator of textual-transmission status. Brown, following Rochberg-Halton after Elman, identifies iškaru as one of three transmission streams: iškaru texts have text-stability and a fixed tablet sequence. Brown notes the Series never became fully fixed, as variant numbering schemes attest, and that mastering (gummuru) the iškaru required oral transmission of its underlying interpretive code beyond mere reading.

In Practice

For source-criticism of Babylonian omen literature, iškaru is the term that identifies an omen as canonical Enūma Anu Enlil Series text. Neo-Assyrian scholars marked Series omens explicitly in their royal reports — "These (omens) are from the series" (annu ša iškari) — and contrasted them with aḫû material flagged as extraneous, as Reports 147 and 158 in Hunger's SAA 8 edition demonstrate. The iškaru / aḫû / ša pî ummâni triad lets the modern reader trace where an omen sat in the scholarly hierarchy of authority. The commentaries (mukallimtu) and explanatory lists (ṣâtu) of Enūma Anu Enlil primarily glossed the iškaru, though aḫû commentaries also survive. The concept anchors how the Babylonian celestial-omen corpus was organized, transmitted, and certified within scribal scholarship.

Historical Origin

Attested in the cuneiform scribal record of the Middle Babylonian and Neo-Assyrian periods (the Enūma Anu Enlil Series compiled in the Middle Babylonian period, used through the late Neo-Assyrian period); the explicit Series marker is ubiquitous in the Sargonid Astrological Reports (SAA 8, 7th century BCE). Modern critical treatments: Hunger, *Astrological Reports to Assyrian Kings* (SAA 8, 1992); Brown, *Mesopotamian Planetary Astronomy-Astrology* (2000); Koch-Westenholz, *Mesopotamian Astrology* (1995).

Further Reading

• Hermann Hunger, Astrological Reports to Assyrian Kings (SAA 8)
• Ulla Koch-Westenholz, Mesopotamian Astrology
• Francesca Rochberg, The Heavenly Writing: Divination, Horoscopy, and Astronomy in Mesopotamian Culture