A woman came to Ibn Masud and said, "I have been told that you forbid hair extensions."He said, "Yes."She said, "Is it something you find in the Book of Allah, or something you heard from the Messenger of Allah ﷺ?"He said, "I find it in the Book of Allah and from the Messenger of Allah ﷺ."She said, "By Allah, I have examined everything between the two covers of the Quran and I have not found in it what you say."He said, "Did you find in it "Whatever the Messenger gives you, take it, and whatever he forbids you, refrain from it" [Hashr 59:7]?"She said, "Yes."He said, "I heard the Messenger of Allah ﷺ forbid the woman who plucks eyebrows, the woman who files her teeth, the woman who joins hair, and the woman who tattoos, except in the case of illness."The woman said, "Perhaps it is found among some of your own wives."He said to her, "Go in and see." She went in, then came out.She said, "I saw nothing wrong."He said, "Then you have not kept in mind the counsel of the righteous servant, "I do not intend to differ from you in what I forbid you" [Hud 11:88]."
أن امرأة جاءت إلى ابن مسعود فقالت: أنبئت أنك تنهى عن الواصلة، قال: نعم. فقالت: أشيء تجده في كتاب الله أم سمعته عن رسول الله ﷺ؟ فقال: أجده في كتاب الله وعن رسول الله ﷺ فقالت: والله لقد تصفحت ما بين دفتي المصحف، فما وجدت فيه الذي تقول. قال: فهل وجدت فيه {وما آتاكم الرسول فخذوه وما نهاكم عنه فانتهوا} قالت: نعم. قال: فإني سمعت رسول الله ﷺ نهى عن النامصة، والواشرة، والواصلة، والواشمة إلا من داء قالت المرأة: فلعله في بعض نسائك. قال لها: ادخلي، فدخلت، ثم خرجت، فقالت: ما رأيت بأسا. قال: ما حفظت إذا وصية العبد الصالح {وما أريد أنا أخالفكم إلى ما أنهاكم} [سورة هود: ٨٨].
Ahmad (3945) and Nasai (5098) both narrated it from the hadith of Qatada, from Azra, from Hasan Arni, from Yahya Jazzar, from Masruq, who mentioned it. Its isnad is sahih.His saying "al-washira" comes from "al-washr" (with a fatha on the waw and a sukun on the shin), which refers to treating the teeth by filing them down and thinning their edges. An older woman does this to make herself resemble young women.Something of similar meaning has been reported from Abu Rayhana as a marfu narration, "The Messenger of Allah ﷺ forbade ten things," among them al-washr. There is some discussion regarding its isnad. See: Book of Marriage, Chapter, A woman should not have bodily contact with another woman.