The 201st prohibition is that we are forbidden to have chometz found in our dwellings, even if it is not visible, or if it is left as a deposit.
The source of this commandment is G‑d's statement,1 "For seven days, no chometz may be found in your homes."
As mentioned above,2 one receives lashes for violating this prohibition only when an action was performed, in accordance with the principles explained in tractate Shavuos.3
Our Sages stated explicitly in a number of places, "One transgresses, 'It may not be seen,' and 'It may not be found.' "4
The laws of these two mitzvos are explained in the beginning of tractate Pesachim.5 There it is also explained which things are prohibited by the verse, "It may not be seen...in all your territories" [N200] and which are prohibited by the verse, "It may not be found in your homes" [N201].
There [in the beginning of Pesachim] it is explained that each of these two prohibitions derives something additional from the other,6 and that one who keeps chometz on Pesach transgresses both, "It may not be seen" and "It may not be found."
