Sahih Muslim Book 31, Hadith Number 6028.

Chapter : The merits of ‘Abdullah b. Mas’ud and that of his mother (Allah be pleased with them).

Ubaidullah b. Mu’adh reported it on the authority of his father Shu’ba with the same chain of transmitters and he made this addition. He made a mention of these two names but I do not know whose name he mentioned first.