Abu Musa Ashari reported,

My brother and I came from Yemen, and for a long time we assumed that Ibn Masud and his mother were members of the Prophet's ﷺ household, given how often they entered upon him and how closely they kept his company.

Bukhari 4384

Sahih

حدثني عبد الله بن محمد وإسحاق بن نصر قالا حدثنا يحيى بن آدم حدثنا ابن أبي زائدة عن أبيه عن أبي إسحاق عن الأسود بن يزيد

عن أبي موسى رضي الله عنه قال

قدمت أنا وأخي من اليمن فمكثنا حينا ما نرى ابن مسعود وأمه إلا من أهل البيت من كثرة دخولهم ولزومهم له

البخاري 4384صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Expeditions
Chapter
Arrival of the Asharis and the people of Yemen
Numbering
Darussalam 4384
Bukhari 4384