عَنْ عَبْدِ اللَّهِ مَوْلَى أَسْمَاءَ بِنْتِ أَبِي بَكْرٍ رَضِيَ اللَّهُ عَنْهَا قَالَ أَرْسَلَتْنِي أَسْمَاءُ إِلَى ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا أَنَّهُ بَلَغَهَا أَنَّكَ تُحَرِّمُ أَشْيَاءَ ثَلَاثَةً الْعَلَمَ فِي الثَّوْبِ وَمِيثَرَةَ الْأُرْجُوَانِ وَصَوْمَ رَجَبٍ كُلِّهِ فَقَالَ أَمَّا مَا ذَكَرْتَ مِنْ صَوْمِ رَجَبٍ فَكَيْفَ بِمَنْ يَصُومُ الْأَبَدَ وَأَمَّا مَا ذَكَرْتَ مِنَ الْعَلَمِ فِي الثَّوْبِ فَإِنِّي سَمِعْتُ عُمَرَ رَضِيَ اللَّهُ عَنْهُ يَقُولُ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ مَنْ لَبِسَ الْحَرِيرَ فِي الْدُّنْيَا لَمْ يَلْبَسْهُ فِي الْآخِرَةِ
It is narrated from Sayyida Asma bint Abi Bakr (may Allah be pleased with them both) by her freed slave Abdullah, who says: Sayyida Asma (may Allah be pleased with her) sent me to Sayyiduna Ibn Umar (may Allah be pleased with them both) to ask him about this matter: Has it reached you from Sayyida Asma (may Allah be pleased with her) that you declare three things forbidden: putting marks and designs on clothes, red silk cushions, and fasting all the days of Rajab? He replied: As for what you said that I do not fast all the days of the month of Rajab, then how would it be for the one who always fasts? As for what you mentioned about marks on clothes, that I prohibit it, I heard Sayyiduna Umar (may Allah be pleased with him) say that the Noble Prophet (peace and blessings be upon him) said: Whoever wears silk in this world will not wear it in the Hereafter.