Imam Ad Dhahabi رحمہ اللہ said:
أَنَّ عُمَرَ كَسَا أَبْنَاءَ الصَّحَابَةِ؛ وَلَمْ يَكُنْ فِي ذَلِكَ مَا يَصلُحُ لِلْحَسَنِ وَالحُسَيْنِ؛ فَبَعثَ إِلَى اليَمَنِ، فَأُتِي بِكِسْوَةٍ لَهُمَا
Saydna Umar ibn al Khattab رضیﷲ عنه dressed the children of other Sahaba رضیﷲ عنهم with new clothes during his caliphate, but there were no clothes that could suit or adore Saydna Hassan and Hussain عليهم السلام.
Saydna Umar then sent a man to Yemen and he brought some fine and beautiful clothes and when Saydna Umar dressed Hassan and Hussain with those Yemeni clothes he said:
الآنَ طَابَتْ نَفْسِي
Now, my heart is happy.
[Seyr al Alam an Nubala 3/285]
