Mishkat al-Masabih
Mishkat al-Masabih 4323, 4324
وَعَنْ عُمَرَ رَضِيَ اللَّهُ عَنْهُ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَهَى عَنْ لُبْسِ الْحَرِيرِ إِلَّا هَكَذَا وَرَفَعَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إصبعيه: الْوُسْطَى والسبابة وضمهما وَفِي رِوَايَةٍ لِمُسْلِمٍ: أَنَّهُ خَطَبَ بِالْجَابِيَةِ فَقَالَ: نَهَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَنْ لُبْسِ الْحَرِيرِ إِلَّا مَوْضِعَ إِصْبَعَيْنِ أَوْ ثَلَاث أَو أَربع
Unreviewed translation. All hadiths in this collection are available in five languages. Titles and introductions may remain in Arabic.
Umar, may Allah be pleased with him, reported that the Prophet ﷺ forbade wearing silk except to this extent, and the Messenger of Allah ﷺ raised and joined his middle and index fingers. In a version from Muslim, the Prophet ﷺ addressed the people at al-Jabiya and said that the Messenger of Allah ﷺ forbade wearing silk except for a strip two, three, or four fingers wide.