Tashlich
The minhag of tashlich dates back to at least the 14 th century. The Maharil (Minhagei Rosh Hashanah 9) writes about going to rivers that contain fish in order to throw our sins into the depths of the sea (Micha 7:19). The Rema (OC 583:2) records this minhag . The basic text is the final 3 Pesukim of Micha (7:18-20) which parallel the Thirteen Midos, Divine Attributes of Hashem. Many add more tefillos, composed primarily by the Chida. While not all observe this minhag, R’ Ovadia Yosef (Yechave Daas 1:54) writes that this is the minhag of Sefardim too, following the Arizal. Different reasons have been offered for this minhag : The Maharil refers to the famous Midrash (Yalkut Shimoni, Bereishis 99). The satan tried various tactics to dissuade Avraham from carrying out the akedah including creating a river. This explains why it took them 3 days to reach Har Hamoriah. The water of tashlich serves to remind us of Avraham’s self-sacrifice (See Gra in his notes to the Rema O...