It was narrated from ‘Abdullah bin ‘Umar that ‘Umar bin Khattab saw a silken two piece suit (being offered for sale). He said: “O Messenger of Allah, why don’t you buy this two piece suit (to wear for meeting) the delegations, and on Fridays?” The Messenger of Allah (ﷺ) said: “This is only worn by one who has no share in the Hereafter.”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ الرَّحِيمِ بْنُ سُلَيْمَانَ، عَنْ عُبَيْدِ اللَّهِ بْنِ عُمَرَ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، أَخْبَرَهُ أَنَّ عُمَرَ بْنَ الْخَطَّابِ رَأَى حُلَّةً سِيَرَاءَ مِنْ حَرِيرٍ فَقَالَ يَا رَسُولَ اللَّهِ لَوِ ابْتَعْتَ هَذِهِ الْحُلَّةَ لِلْوَفْدِ وَلِيَوْمِ الْجُمُعَةِ . فَقَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " إِنَّمَا يَلْبَسُ هَذَا مَنْ لاَ خَلاَقَ لَهُ فِي الآخِرَةِ " .
sunnah.com