Abdullah, the freed slave of Sayyidah Asma' bint Abi Bakr (may Allah be pleased with her), said: Sayyidah Asma' sent me to Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) and said: "I have learned that you declare three things unlawful: 1. a striped (bordered) garment, 2. the red saddle cushion, 3. fasting the whole month of Rajab." Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said to me: As for what you mentioned about Rajab, then what of one who fasts perpetually? As for the border on a garment, I heard Sayyiduna Umar (may Allah be pleased with him) say that the Prophet (peace and blessings be upon him) said: "Silk is worn only by those who have no share in the Hereafter." So I feared that the border might be part of it. As for the red saddle cushion, this is Abdullah's cushion, and it is red. I went back to Sayyidah Asma' (may Allah be pleased with her) and informed her, and she said: This is the cloak (jubbah) of the Prophet (peace and blessings be upon him). She brought out before me a Tayalisi cloak whose collar was of silk brocade and whose two slits were hemmed with brocade. (She said:) This was with Sayyidah Aishah (may Allah be pleased with her), and when she passed away, I took it. The Prophet (peace and blessings be upon him) used to wear it, and we would wash this cloak for the sick and seek healing through it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4210