Dayenu -- Persian-style scallion whipping By Sam Yebri

Jews from Iran and Afghanistan have a particularly lively custom in which they whip each other with oversize scallions. Before the song begins, each seder participant stands, takes a scallion and starts whacking the other members of the feast. While some debate where the custom originates, many believe it is a way to mimic the whips of slave drivers in Egypt.

haggadah Section: -- Cup #2 & Dayenu
Source: Sam Yebri