'Best are those who bring the most benefit to mankind'

credit: baizooka

Do good for the sake of your Lord alone and never expect anything in return

In the Holy Quran we are told: 

     "(The righteous are those) who feed the poor, the orphan 
     and the captive for the love of Allah, saying: 'We feed you 
     for the sake of Allah alone, we seek from you neither 
     reward nor thanks.'" [Sura Al-Insan 76:8-9]

Say and do good, for verily Shaytaan is to man a plain enemy (Sura Al Isra)

"And say to My slaves that they should (only) say those words that are the best. Shaytaan verily, sows a state of conflicts and disagreements amongst them. Surely, Shaytaan is to man a plain enemy." (Sura Al Isra' 17:53)