This piyyut, “Amar Yitsḥaq,” was originally written as an introduction to the fifth commandment, the commandment of honoring your father and mother. In the eyes of the payṭan, the quintessential example of honoring your father is an incredibly morbid one — Isaac, encouraging his father to go through with it on the altar and begging him to strike true, so that the sacrifice isn’t rendered unfit! It incorporates midrashic narratives about Isaac’s total willingness to go through with the sacrifice, as well as his longing for his mother in the process. To our modern eyes it is quite a disturbing work! But it’s worth remembering that there were many cases in medieval Europe of Jewish parents so desperate and terrified on account of the Crusades that they killed their own children rather than have them submit to baptism. Perhaps this poem provided those who heard such horrific stories some comfort.