Hud 11:115. Juz 12, page 234.
وَٱصْبِرْ فَإِنَّ ٱللَّهَ لَا يُضِيعُ أَجْرَ ٱلْمُحْسِنِينَ١١٥
And have patience, (O Muhammad), for lo! Allah loseth not the wages of the good.
Hud 11:115, translated by Marmaduke Pickthall