Do not eat leaven on Pesach.
“Do not eat leaven bread” Shemos 13:3, even benefitting is prohibited.
If one deliberately eats an olive size of leaven bread on Pesach, he is liable for spiritual severance.
If done accidentally he has sinned whether one eats it or if one dissolves it and drinks it.
One who eats less than an olive size should be whipped for disobedience.
This applies in all places at all times for men and women.