Narrated Zayd ibn Aslam: Ibn Umar used to dye his beard with yellow colour so much so that his clothes were filled (dyed) with yellowness. He was asked: Why do you dye with yellow colour? He replied: I saw the Messenger of Allah (ﷺ) dyeing with yellow colour, and nothing was dearer to him than it. He would dye all his clothes with it, even his turban

English translation · Sunan Abu Dawud