(265) بَابُ مَنْ أَحَبَّ كِتْمَانَ السِّرِّ، وَأَنْ يُجَالِسَ كُلَّ قَوْمٍ فَيَعْرِفَ أَخْلاَقَهُمْ
'Abdullah ibn 'Abdu'r-Rahman ibn 'Abdu'l-Qari reported that 'Umaribn al-Khattab and an Ansari man were sitting together when 'Abdu'r-Rahmanibn 'Abdu'l-Qari came and sat with them. 'Umar said, "We do not want tostop our conversation." 'Abdu'r-Rahman said, "I will not sit with thosepeople, Amir al-Mu'minin." 'Umar said, "Sit with so-and-so and so-and-soand do not stop our conversation. Then he asked the Ansari, "Who do youthink should be the khalif after me?" The Ansari counted off some men amongthe Muhajirun, but did not mentioned 'Ali. 'Umar asked, "What do they haveagainst Abu'l-Hasan (i.e. 'Ali)? By Allah, if he were in charge of them,he would be the best suited to set them on the Path of the Truth."
Reference: Al-Adab Al-Mufrad 582
In-book reference: Book 30, Hadith 45
English translation: Book 30, Hadith 582