This genre, unlike most genres of piyyut, does not go back to late antiquePalestine, but rather to high medievalEurope. The first known author to write a poem in this genre was Joseph Kimhi, who was born in Muslim Spain, but spent his later life in Narbonne, Provence. Kimhi wrote two piyyutim to embellish this prayer: the first one, “Yom Shabbat Zakhor”, is intended to be recited before the beginning of the standard liturgical paragraph “Magen Avot”, and every line ends in the syllable "-hu", to rhyme with the end of the first sentence of “Magen Avot” ; the second one, “Yom Shabbat Shamor”, is intended to be recited before the second line of the standard paragraph, and every line ends in the syllables "-lehem", to rhyme with the end of that second line in the standard paragraph,. These two poems of Joseph Kimhi had very different fates; “Yom Shabbat Zakhor” became quite popular, and appears in a number of manuscripts; the first two lines even made it into printed rites, and are recited even today in some synagogues of the Western Ashkenazic Rite on the evening of the Festival of Shavu‘ot that falls on the Sabbath. Though Joseph Kimhi was in Provence, the genre really became popular only in Germany. In the late 13th century, Samuel Devlin of Erfurt wrote a Magen Avot poem “Shipperam Ram Be-ruḥo”, following the style of “Yom Shabbat Zakhor”, and intended to be inserted in the same place in the liturgy. Like Kimhi's poems, this one is about the Sabbath in general. Later German poets wrote piyyutim of this general specifically for special Sabbaths, and Sabbaths that fell on holidays; these poems speak not only about the Sabbath, but also about the specific themes of the given holiday. The twentieth-century scholar Ezra Fleischercollected, from Ashkenazic manuscripts, no fewer than eighteen such poems, by various poets, for occasions throughout the year, such as: a Sabbath that falls on Rosh Chodesh, or Hanukkah, or Rosh Hashana, or Shabbat Naḥamu; and lifecycle events, such as a Sabbath on which a wedding or circumcision is being celebrated in the community. In all of these, every line ends with the rhyming syllable "-hu", just as in “Yom Shabbat Zakhor”.
