It is narrated from Sayyidah Asma bint Abi Bakr (may Allah be pleased with her) that she brought out a cloak whose buttons were of brocade (silk) and said: "The Messenger of Allah (peace and blessings be upon him) used to wear this in war."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20637