The [fornicatress] woman or [fornicator] man found guilty of sexual intercourse –- lash each one of them with a hundred lashes, and do not be taken by pity for them in the religion of Allah , if you should believe in Allah and the Last Day. And let a group of the believers witness their punishment.
Meaning:-
Fornicatress: a woman guilty of fornication. (Meaning of Fornication: voluntary sexual intercourse between two unmarried persons or two persons not married to each other.
Fornicator: a person who has sex with someone who they are not married.
Lash: strike (someone) with a whip or stick.