عَنْ سُوَيْدِ بْنِ غَفْلَةَ أَنَّ عُمَرَ رَضِيَ اللَّهُ عَنْهُ خَطَبَ النَّاسَ بِالْجَابِيَةِ فَقَالَ نَهَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ عَنْ لُبْسِ الْحَرِيرِ إِلَّا مَوْضِعَ إِصْبَعَيْنِ أَوْ ثَلَاثَةٍ أَوْ أَرْبَعَةٍ وَأَشَارَ بِكَفِّهِ
Suwaid bin Ghaflah says: Sayyiduna Umar bin Khattab (may Allah be pleased with him) delivered a sermon at the place of Jabiya and said: The Noble Prophet (peace and blessings be upon him) forbade wearing silk, except for an amount equal to two or three or four fingers, and at the same time, he (peace and blessings be upon him) gestured with his palm.