So according to Exodus, this Passover ritual was established on Israel's last night of slavery while the angel of death passed over the dwellings that were marked with blood.

根据《出埃及记》记载，犹太人的逾越节,诞生在犹太人最后一天做奴隶,当死亡天使越过每一户门口有血记号的房子的时候。

耶鲁公开课 - 旧约导论课程节选

The lamb will then be eaten as a family meal, and its blood will be smeared on the doorposts to mark the house so the angel of death knows to pass over that house -handy and the pun works in Hebrew, as well as English, In addition, each family is to eat unleavened bread.

然后这家人把羊吃掉，然后把羊血涂在门柱上，作为标记,所以当死亡天使经过的时候便可以看到,这里有一个在希伯来语和英语中都能讲得通双关语，除此之外，每一家都要吃没有发酵的面包。

耶鲁公开课 - 旧约导论课程节选