Also on the authority of Nu’aym bin Hammaad:

It was once said to ‘Abdullah bin Al-Mubaarak, “O Abu ‘Abd Al-Rahmaan, you often sit alone at home.” He said, “I am alone? I am with the Prophet - Allaah’s peace and blessings be upon him – and his Companions.” Meaning: reading hadeeth.

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It was once said to ‘Abdullah bin Al-Mubaarak, “After you have prayed with us you don’t sit with us?” He replied, “I go and sit with the Sahaabah and the Taabi’een.” We said, “And how can you sit with the Sahaabah and Taabi’een (when they have all passed away)?” He replied, “I go and read the knowledge I have collected, I find their narrations and deeds. What would I do with you? You sit around backbiting people.”