What did Abu Musa Al-Ash`ari and his brother observe about `Abdullah bin Mas`ud when they came from Yemen to the house of the Prophet Muhammad (saw)?
 Narrated Abu Musa Al-Ash`ari:                     My brother and I came from Yemen, and for some time we continued to consider `Abdullah bin Mas`ud as one of the members of the family of the Prophet because we used to see him and his mother going in the house of the Prophet very often.