148
Musnad AhmedIt was narrated from "Umar bin al-Khattab that he said:
Wear izars and rida"s and wear shoes, but take off boots and pants; throw away the stirrups and jump onto your mounts. You should wear rough clothes and practise archery, and keep away from luxury and the dress of the non-Arabs, Beware of silk, for the Messenger of Allah (ﷺ) forbade it and said: "Do not wear silk except this much" - and the Messenger of Allah (ﷺ) gestured with two fingers.
Reference: Musnad Ahmad 301
Arabic/English book : Book 2, Hadith 301
Arabic/English book : Book 2, Hadith 301