‏اللباس والزينة‏ : Hadeeth No:5244 Jabir b. 'Abdullah reported that Abu Qubafa was led (to the andience of the Prophet) on the day of the Conquest of Mecca and his head and beard were white like hyssop, whereupon Allaah's Messenger (sallAllaahu alayhi wa sallam) said: Change it with something but avoid black....

‏الذكر والدعاء والتوبة والاستغفار‏ : Hadeeth No:6564 This hadith has been narrated on the authority of Shu'ba with the same chain of transmitters....