"Those who commit immorality of your women — bring against them four [witnesses] from among you. And if they testify, confine them to houses until death takes them or Allah ordains for them [another] way."
What the verse says
Women proven guilty of sexual immorality by four witnesses are to be imprisoned at home until they die. The Saheeh International footnote explicitly acknowledges this was abrogated by 24:2, which prescribes 100 lashes instead. The parallel Q4:16 on men who commit the equivalent act prescribes unspecified punishment, then adds that if they repent and reform, "leave them alone." The abrogated verse remains in the canonized Quran as written text.
Why this is a problem
Louay Fatoohi, in Abrogation in the Qur'an and Islamic Law (Routledge, 2013), examines the abrogation of women's rights law and the problem of abrogated verses remaining in canonical text, treating Q4:15 as an explicitly abrogated verse with acknowledged gender asymmetry. The verse illustrates the abrogation problem while compounding it with a stark gender asymmetry: women receive life imprisonment while men receive a conditional warning — "leave them alone if they repent." This asymmetry is not incidental; it is written into the structure of the verse, not corrected by the later abrogating verse (Q24:2), and it remained intact across subsequent application of the hudud laws. The abrogation itself poses a further problem: either the original rule was a genuine divine command later overturned — divine trial and error, incompatible with omniscience — or it was never meant as eternal law, which undermines the Quran's self-description as eternal. Either way, the abrogated verse's continued presence in the text provides no internal signal that it has been superseded. The four-witness requirement adds a further dimension: requiring four witnesses to sexual immorality makes conviction nearly impossible — but the same evidentiary standard was later applied in rape cases, meaning victims who could not produce four witnesses risked being prosecuted for the very act they reported.
The Muslim response
Muslim scholars defend Q4:15 within the abrogation framework: the Quran itself (Q2:106) explicitly allows Allah to substitute better or similar verses for earlier ones, and Q4:15 represents a transitional provision that was always intended as temporary pending a definitive ruling. The progression from house confinement to corporal punishment (24:2) represents a more workable and less destructive penalty structure — a genuine improvement. As for the gender asymmetry between 4:15 (women imprisoned) and 4:16 (men rebuked then left alone if they repent), classical scholars note that the different treatment reflected evidentiary realities and the need for proportionate social management in the early Muslim community, not a permanent divine statement about gendered moral culpability. The broader Quranic framework requires equal accountability for men and women (Q33:35), which governs the interpretation of the specific verses.
Why it fails
Progressive revelation concedes that the original rule was neither optimal nor eternal — which contradicts the Quran's self-description as the unchanging word of an omniscient God. The abrogated verse remains in the text offering no internal signal that it has been overridden, meaning a reader encountering it without the naskh tradition applies a rule Allah has since canceled. The harsher penalty directed only at women while men receive the "leave them alone if they repent" treatment is the fingerprint of 7th-century Arabian patriarchy embedded in divine law, not divine justice applied equally. The appeal to Q33:35 does not undo this: that verse concerns the equal spiritual reward and accountability of believing men and women before God, not the penal asymmetry of 4:15–16, and classical jurists applied the specific penal verses without ever treating the general equality verse as overriding them. And the progressive-revelation defense applies equally to everything else the Quran contains that moderns find problematic — which is precisely what Islamic legal reformists argue but which classical tradition rejects on principle.