The golden age in Spain, 900–1200
Spanish Jewry began to flourish in Muslim Spain under the caliphate of Córdoba, where Hasdai ibn Shaprut, a vizier, was the first great patron of Hebrew letters. His secretary, Menahem ben Saruk (died c. 970), wrote a biblical lexicon, which was criticized by Dunash ben Labrat when the latter arrived in Spain with philological ideas from the East. Samuel ha-Nagid, vizier of Granada (990–1055), himself a poet and philologist, gathered around him a group of poets, most outstanding among whom was Ibn Gabirol. Moses ibn Ezra of Granada (died c. 1139) was the centre of a brilliant circle of poets. Moses’ kinsman Abraham ibn Ezra, a poet, philosopher, grammarian, and Bible commentator, attacked the language and style of the early payṭanim; he and Judah ben Samuel Halevi were the first to use Arabic metres in religious poems. Dominated by Arab standards of taste, the secular poetry dealt with themes of Arabic poetry and often reproduced Arabic phrases; it was written to be appreciated by a small circle of connoisseurs and declined with the collapse of Jewish prosperity in Muslim Spain. The last major poet in Spain was Judah ben Solomon Harizi, who translated various philosophical works into Hebrew.
The use of biblical Hebrew was made possible by the work of philologists. Of great importance was the creation of comparative linguistics by Judah ibn Kuraish (about 900) and Isaac ibn Barun (about 1100). Judah Hayyuj, a disciple of Menahem ben Saruk, recast Hebrew grammar, and, in the form given to it by David Kimhi of Narbonne (died c. 1235), the new system was taken over by the Christian humanists and through them by modern scholarship. The first complete Hebrew grammar, Kitāb al-lumaʿ (1886; “The Book of the Variegated Flower Beds”), was written by Ibn Janāḥ of Córdoba (died 1050).
Jewish medieval philosophers in Spain wrote in Arabic, not Hebrew, until the 13th century. Apart from Isaac Israeli (north Africa, died c. 940) few medieval Jews made original contributions to science, but the Spanish Jews shared the best scientific education. Abraham bar Hiyya (died c. 1136) of Barcelona was an original mathematician who wrote in Hebrew works on mathematics, astronomy, and philosophy. When the Almohads expelled the Jews from Muslim Spain in 1148, many learned refugees went to Languedoc and Provence and there translated scientific and philosophical works.