This zulat piyyut, by R. Shmuel bar Yehuda (fl. 12th c.), is a keening cry in response to the traumatic First Crusade Rhineland massacres, known as the Gzerot TaTN”O in Hebrew, specifically focusing on the 3 Sivan massacre and martyrdoms in Mainz. The massacres of the Gzerot TaTN”O were so traumatic to Ashkenazi Jewry that to this day, the Av haRaḥamim prayer for martyrs, usually elided on Shabbat Mevorkhim, is not elided on Shabbat Mevorkhim Iyar or Sivan. As a zulat, it is recited at the end of the “Emet v-Emuna” paragraph. Generally the second half of the paragraph is altered slightly when a zulat is inserted. In this case, the alteration, according to the old Nusaḥ Polin, is included. . . .