Unleavened bread shall be eaten seven days. And no leavened bread shall be seen among you, nor shall leaven be seen among you in all your quarters.
Exodus 13:7
Surrounding context
13:6 Seven days you shall eat unleavened bread, and on the seventh day there shall be a feast to the LORD.
13:7 Unleavened bread shall be eaten seven days. And no leavened bread shall be seen among you, nor shall leaven be seen among you in all your quarters.
13:8 And you shall tell your son in that day, saying, "This is done because of what the LORD did for me when I came up from Egypt.'