My brother and I came from Yemen (to Medina) and remained for some time, thinking that Ibn Masud and his mother belonged to the family of the Prophet ﷺ because of their frequent entrance (upon the Prophet) and their being attached to him. (Using translation from Bukhārī 4384)   

«قَدِمْتُ أَنَا وَأَخِي مِنَ الْيَمَنْ عَلَى رَسُولَ اللهِ ﷺ فَمَكَثْنَا حِينًا وَمَا نَحْسُبُ ابْنَ مَسْعُودٍ وَأُمَّهُ إِلَّا مِنْ أَهْلِ بَيْتِ النَّبِيِّ ﷺ مِنْ كَثْرَةِ دُخُولِهِمْ وَلُزُومِهِمْ لَهُ»