question #3 Sahih al-Bukhari 4999, Book 66, Hadith 21 : How does the recommendation of certain companions highlight the importance of selecting knowledgeable teachers in Islam?

`Abdullah bin `Amr mentioned `Abdullah bin Masud and said, “I shall ever love that man, for I heard
the Prophet (ﷺ) saying, ‘Take (learn) the Qur’an from four: `Abdullah bin Masud, Salim, Mu`adh and Ubai
bin Ka`b.’ ”