Exodus 12:18-20

Thomson(i) 18 Beginning at evening with the fourteenth day of the first month, you shall eat unleavened bread until the evening of the twenty first day. 19 For seven days there must be no leaven found in your houses. Whoever shall eat leavened bread, that soul shall be cut off from among the congregation of Israel; whether he be a stranger or born in the land. 20 You shall eat nothing that is leavened. But in all your habitations you must eat unleavened bread.