Unlawful Sex
As for those women among you who commit a grave indecency, call upon four witnesses from among yourselves to testify against them. If they bear witness, then confine those women to their homes, until death claims them, or Allah opens for them a path forward.
4:15As for those of your women who are guilty of lewdness, call to witness four of you against them. And if they testify (to the truth of the allegation) then confine them to the houses until death take them or (until) Allah appoint for them a way (through new legislation).