RARE critical edition of the original Arabic text of a treatise on Hebrew verbs by the eminent medieval Jewish linguist Judah ben David Hayyuj (Abu Zakariyya Yahya ibn Dawud, 945-1000). 225x155mm. LXXXV+271 pages. Patterned blue rebound Hardcover with green cloth spine. Original cover pasted on front. Spine stained. Spine bottom edge and rear hinge rubbed. Inner cover and whitepges somewhat age- and glue-stained. Several pages upper corner slightly creased. Small light bump-mark on several pages upper corner. Pages yellowing. [SUMMARY]: This extremely rare critical edition of an influential medieval Arabic work on Hebrew verbs, written by the father of scientific grammar of Hebrew language, is in good condition.