“Sit in the Gatherings of the pious servants of Allah.
You will find goodness in their company.
At the end of their gatherings, Allah Ta`ala’s mercy
descends upon them and (there is great hope that) it will
envelop you also.
Never sit in the company of the evil, because you will not
acquire any goodness with them. Retribution descends
upon them and (there is a possibility) that it will inflict
you also.” 
 (Zuhd, Page 106)