Wearing silk and brocade in war Sunan Ibn Majah 2820

Arabic hadith text
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا حَفْصُ بْنُ غِيَاثٍ، عَنْ عَاصِمٍ الأَحْوَلِ، عَنْ أَبِي عُثْمَانَ، عَنْ عُمَرَ، أَنَّهُ كَانَيَنْهَى عَنِ الْحَرِيرِ، وَالدِّيبَاجِ، إِلاَّ مَا كَانَ هَكَذَا ثُمَّ أَشَارَ بِإِصْبَعِهِ ثُمَّ الثَّانِيَةِ ثُمَّ الثَّالِثَةِ ثُمَّ الرَّابِعَةِ وَقَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَنْهَانَا عَنْهُ ‏.‏
Translation
It wasnarrated from ‘Umar that he used to forbid silk and brocadeexceptthat which was like that, then he gestured with his finger,then hissecond finger, then his third, then his fourth,* and said

“TheMessenger of Allah (ﷺ) used to forbid that to us.”